If you look at the table with 4 billionaires in the propublica article, 3 of the 4 (Bezos, Musk, and Buffett) paid tax rates of over 20% of their reported incom

If you look at the table with 4 billionaires in the propublica article, 3 of the 4 (Bezos, Musk, and Buffett) paid tax rates of over 20% of their reported income, consistent with the 15% long term capital gain rate.