As of November 30, 2025, the U.S. has not enacted a federal wealth tax, and the top federal marginal income tax rate remains 37%, not anywhere near 70–80%.

• The current 2025 federal individual income tax brackets show a top marginal rate of 37% for high-income filers; rates and structure follow the Tax Cuts and Jobs Act framework.(taxfoundation.org)
• The 2025 One Big Beautiful Bill Act (Trump’s second-term tax package) permanently extends the existing TCJA individual tax rates instead of raising them, locking in the 37% top rate rather than moving it toward 70–80%.(en.wikipedia.org)
• Proposals for taxing large fortunes—such as Sen. Elizabeth Warren’s Ultra-Millionaire Tax Act of 2021 and President Biden’s proposed “Billionaire Minimum Income Tax”—have been introduced and debated but have not passed into law.(en.wikipedia.org)
• Tax guides and comparative descriptions of the U.S. system continue to note no federal net wealth tax; only certain states consider limited wealth‑style taxes, and property/estate taxes persist but are not new broad wealth taxes of the sort implied in the prediction.(moore-global.com)
• Even Democratic tax plans framed as hitting the rich (e.g., Biden’s budgets) have at most sought to restore the top rate to 39.6%, far below the 70–80% range predicted.(budgetmodel.wharton.upenn.edu)

Given that (1) no broad federal wealth tax has been enacted and (2) policy has moved away from very high top income tax rates (with 37% now made permanent) rather than toward 70–80%, Friedberg’s prediction has not materialized in the "coming years" since 2021 and is best classified as wrong.