Four Democratic proposals now target top wealth, led by a Sanders-Khanna plan for a 5% annual tax on about 938 billionaires and Warren’s 2% to 3% levy on households above $50 million.
Revenue estimates vary sharply: economists Emmanuel Saez and Gabriel Zucman say the Sanders plan could raise $4.4 trillion over a decade, while the Tax Foundation and AEI put it at $3.3 trillion and $2.3 trillion.
Critics say wealth taxes abroad often underperformed and drove asset shifting or relocation; only Spain, Norway and Switzerland still keep such taxes after 12 European countries had them in the 1990s.
The push comes as Washington projects a roughly $2 trillion fiscal 2026 deficit, though even optimistic estimates suggest the taxes would cover only part of the gap.
Legal uncertainty still hangs over the proposals, with scholars split on whether taxing unrealized gains or accumulated wealth would survive constitutional challenge.
Given Europe’s history with capital flight, what could make an American wealth tax succeed where others failed?
If wealth taxes only cover a fraction of the deficit, what is their primary role in a long-term U.S. fiscal plan?