Calculated 'True Tax Rate' as a function of taxes paid compared to overall wealth.  Uh no.  The proper calc is tax paid compared to income.  Using this proper method, we get the following:

Buffet          18%

Bezos          23%

Bloomberg     3%

Musk            31%

LOL Propublica

The Secret IRS Files: Trove of Never-Before-Seen Records Reveal How the Wealthiest Avoid Income Tax — ProPublica