ANALYSISApril 13, 2026
Should the United States impose a wealth tax on the ultra-rich?
Multiple federal legislative proposals — including Senator Elizabeth Warren's Ultra-Millionaire Tax Act of 2026, the Sanders-Khanna Make Billionaires Pay Their Fair Share Act, and Senator Ron Wyden's Billionaires Income Tax Act — are currently before Congress, seeking to impose annual taxes on the net worth of America's wealthiest households. Simultaneously, states including California, Massachusetts, Washington, and New York are advancing or have passed their own taxes targeting high-net-worth individuals. The proposals come as Federal Reserve data from Q3 2025 shows the top 1% holding $55 trillion in assets, equal to 31.7% of all U.S. wealth.
If a billionaire's fortune grows by $10 billion in a year but they never sell a share, did they earn income — and does the government have the right to take a cut anyway? The answer depends entirely on whether you think extreme wealth is a personal achievement or a public problem.
Not familiar with this story? Get context →
European repeal record as precedent
C
Germany, Sweden, Finland, and France all tried national wealth taxes and repealed every single one — not because of right-wing capture, but because revenues fell short, capital fled, and valuing illiquid assets proved administratively unworkable. That is not a right-wing talking point; it is documented OECD history. Before America repeats this experiment, we should ask why we think we will succeed where a dozen sophisticated democracies concluded it was broken.
L
The European comparison is real and deserves honest engagement — but it misses the structural difference that matters most. European wealth taxes operated on open capital markets where assets could be relocated to neighboring jurisdictions within hours. The United States taxes citizens on worldwide income regardless of residence, and renouncing citizenship triggers an exit tax. The specific mechanism that sank the European experiments is substantially constrained here.
C
The exit tax argument addresses emigration, not avoidance — and avoidance is what actually killed European revenue projections. Sophisticated wealth doesn't need to leave the country; it gets restructured into hard-to-value private equity, family limited partnerships, and offshore trusts, and suddenly the taxable base shrinks without anyone boarding a plane.
L
That avoidance concern is legitimate, but it's an argument for building serious IRS enforcement capacity — not for concluding the problem is unsolvable. The IRS already values complex illiquid assets for estate tax purposes; we've chosen not to scale that infrastructure, not proven it can't be done.
Targeted reforms versus wealth tax instrument
C
What ProPublica's IRS leak actually revealed wasn't that a wealth tax is necessary — it revealed that the realization-based income tax system is broken. Bezos and Musk paid little income tax because they borrowed against appreciating stock instead of selling it. The fix is taxing capital gains at death, eliminating stepped-up basis, and treating carried interest as ordinary income. A wealth tax is a different instrument entirely, and conflating these two problems produces bad solutions.
L
The conservative diagnosis is correct and the targeted tools are real — but this argument has a fatal flaw in practice. Congress has had stepped-up basis repeal, capital gains reform, and carried interest treatment available for decades and has repeatedly failed to pass them. That failure isn't accidental; it reflects the same concentrated political influence that the wealth gap itself produces. Arguing that better alternatives exist doesn't help if those alternatives cannot survive the legislative process.
C
The repeated failure of targeted reforms is an argument for fighting harder for them, not for concluding a blunter instrument is therefore justified. If a wealth tax passes and then faces a decade of constitutional litigation and administrative collapse, that doesn't fix anything — it just gives Congress a reason to declare victory without delivering results.
L
But 'fight harder' has been the position for thirty years while effective rates on the ultra-wealthy fell from 30% to 23.8%. At some point, the instrument that can actually pass matters more than the instrument that is theoretically superior in a compliant Congress.
Buy-borrow-die structural tax subsidy
C
The stepped-up basis loophole is a genuine and specific problem — a nurse in Cincinnati paying a higher effective rate than a billionaire who borrows against $200 billion in stock and dies with the gains erased is a real policy failure. But this is a targeted defect with a targeted fix. Eliminate stepped-up basis, tax gains at death, and you close the 'buy, borrow, die' strategy without building an entirely new administrative apparatus to value every private art collection in America annually.
L
We agree on the diagnosis: the stepped-up basis is indefensible, and 'buy, borrow, die' is a structural subsidy, not a loophole. But the conservative is describing a fix that has been on the table for decades and has not moved, while wealth concentration has. Senator Wyden's Billionaires Income Tax frames annual gains as taxable income rather than a direct property tax — constitutionally cautious, administratively scoped to the ultra-wealthy, and it closes exactly the aperture you're describing.
C
Wyden's mark-to-market approach for publicly traded assets is the most defensible version of this argument — but it still runs into the illiquid asset problem the moment you get past stock portfolios into private businesses and real estate, which is precisely where the largest concentrations of billionaire wealth actually sit.
L
Scope it to publicly traded assets first, then extend it — that's a more honest version of 'start targeted.' The conservative position seems to be that any reform touching unrealized gains is too hard, while every targeted alternative that avoids that problem somehow fails to pass. That's not a policy position; it's a permanent holding pattern.
Administrative feasibility of annual valuation
C
The valuation problem is not a technicality — it is the entire problem. Public companies have share prices, but the ultra-wealthy hold stakes in private businesses, art collections, and illiquid partnership interests. Valuing those annually requires either systematic undervaluation by taxpayers and their advisors, or an army of IRS appraisers making contestable judgments on millions of line items. The CBO and Tax Policy Center have both flagged that avoidance and administrative drag would substantially reduce actual collections below the Saez-Zucman projections.
L
The IRS already does exactly this for estate tax purposes — complex, illiquid assets get appraised at death, contested by lawyers, and resolved through established processes. The conservative is arguing that something the government demonstrably does at one point in time is somehow impossible to do annually. The honest version of this objection is that it would be expensive and contested, not that it is categorically unworkable.
C
Estate tax appraisals happen once per death for a relatively small number of estates — scaling that process to annual valuations across thousands of ultra-wealthy taxpayers is a categorically different administrative burden, and the compliance gap between those two tasks is precisely what reduced European revenues to well below projections.
L
Sweden's wealth tax covered a broad middle class, not just the ultra-wealthy — a U.S. version scoped to billionaires would involve a fraction of that administrative load. Comparing them directly overstates the complexity of what's actually being proposed.
Constitutional viability of direct tax
C
The Article I direct tax clause is not a procedural footnote — it is a genuine unresolved constitutional question in a modern wealth tax context. A multi-trillion-dollar legislative program built on a foundation that one adverse Supreme Court ruling could collapse is not a program; it is a political gesture. The stakes of getting this wrong include a decade of litigation, market uncertainty, and deferred revenue while Congress declares victory on a problem it has not solved.
L
The constitutional risk is real, which is why the Wyden Billionaires Income Tax is designed specifically to avoid it — framing annual mark-to-market gains as taxable income under the 16th Amendment rather than a direct property tax. The conservative is right that a straightforward wealth tax faces genuine Article I exposure, but treating that as a reason to do nothing ignores that constitutionally defensible alternatives already exist and have been drafted.
C
Wyden's approach is more defensible, but 'more defensible' is not 'settled.' Framing unrealized gains as income is itself a novel theory that has never been tested at the Supreme Court, and a 6-3 Court that just struck down Chevron deference is not obviously the tribunal you want resolving novel taxing theories in favor of the government.
L
That's a legitimate concern about this specific Court — but it applies equally to the argument that targeted reforms like stepped-up basis repeal would survive challenge. Constitutional risk exists across the board; selectively invoking it only against wealth taxes proves too much.
Democratic mandate versus policy workability
C
Seventy-eight percent of Americans supporting a billionaire tax is not a policy design — it is a polling result. The same democratic instinct produced European wealth taxes, and those majorities were not wrong to want redistribution; their governments were wrong to promise an instrument that couldn't deliver it. Popularity tells you there's a problem; it doesn't tell you the proposed solution actually solves it.
L
The conservative is right that polling support isn't policy design — but 78% of Americans identifying a problem and 30 years of Congress failing to address it through any mechanism isn't just a design question anymore. When concentrated wealth can consistently block the targeted reforms that conservatives themselves say are the right answer, the political economy of the problem is part of the policy problem.
C
That argument proves too much — it says that because the political system is captured, we should pass whatever reform is most popular regardless of whether it works. A wealth tax that generates half its projected revenue and collapses in litigation doesn't break the cycle of concentrated influence; it just gives the public a feeling of action without the substance.
L
The alternative being offered is: the correct tools exist, Congress won't pass them, so the situation is unfortunate but the blunter instrument is off the table too. That's not a reform position — that's a description of permanent stalemate dressed up as policy analysis.
Conservative's hardest question
The most difficult counter-evidence to dismiss is the sustained, documented decline in effective tax rates on ultra-high-net-worth individuals — from 30% to 23.8% over roughly a decade — occurring precisely as existing reform mechanisms were available but not used. This undermines the conservative argument that targeted fixes are sufficient, since Congress has consistently failed to enact them, and a wealth tax's bluntness may be a feature rather than a bug in a political environment that cannot pass narrower reforms.
Liberal's hardest question
The European repeal record is the hardest evidence to dismiss: every major national wealth tax in the developed world has either failed to meet revenue projections or been repealed within decades, and the administrative complexity of valuing illiquid private assets annually is not a solved problem. Even if the U.S. exit-tax mechanism limits outright emigration, sophisticated avoidance — restructuring assets into hard-to-value private equity, family partnerships, or offshore trusts — could suppress actual revenues far below the Saez-Zucman $6.2 trillion projection, which critics argue assumes unrealistically low behavioral responses.
Both sides agree: Both sides agree that the current realization-based income tax system — which allows wealth to compound through the 'buy, borrow, die' strategy entirely legally — represents a structural failure that the existing framework was not designed to correct.
The real conflict: A factual and predictive conflict: the liberal argues that U.S. citizenship-based taxation and exit taxes structurally limit the capital flight that sank European wealth taxes, while the conservative argues that domestic avoidance — restructuring assets into illiquid private vehicles — replicates the same revenue erosion through different mechanisms.
What nobody has answered: If targeted reforms — stepped-up basis repeal, capital gains at death, carried interest treatment — are the agreed-upon superior instruments, and they have failed to pass Congress repeatedly while wealth concentration has accelerated, at what point does their repeated failure become evidence that the political system itself has been captured by the concentration it was meant to correct, and what does either side propose to do about that?
Sources
- Federal Reserve Distributional Financial Accounts, Q3 2025
- Institute for Policy Studies billionaire wealth analysis, 2025
- UC Berkeley economists Emmanuel Saez and Gabriel Zucman, revenue projections for Warren Ultra-Millionaire Tax Act
- Pew Research Center poll, 2025, on tax rates and income thresholds
- January 2025 poll on wealth inequality and billionaire taxation
- Nestpoint poll on California Billionaire Tax Act
- Sanders-Khanna Make Billionaires Pay Their Fair Share Act, introduced March 2, 2025
- Warren Ultra-Millionaire Tax Act of 2026 legislative text and summary
- Wyden Billionaires Income Tax Act summary
- California Billionaire Tax Act (2026 proposal) legislative summary
- Congressional Budget Office and Tax Policy Center analyses of wealth tax revenue and avoidance
- European wealth tax repeal history (OECD documentation)