"But debate about how much tax billionaires pay is likely to grow as America's fiscal situation deteriorates and its wealth gap widens. Data from the Federal Reserve shows that only the richest 1% of households have grown their share of overall U.S. wealth since 1990. Their share hit a record 32% in the third quarter of 2025, equivalent to $54.8 trillion.

Gains made by the billionaire class, the very top 0.1% of households and a subset of the 1%, have eclipsed the merely extremely rich. This group's share of U.S. net wealth has risen nearly 6 percentage points to 14.4% since 1990."

more at non-paywall version of WSJ article: