I read your whole comment and am very interested in seeing a source for how Bezos earned $60 billion last year as private taxable income. The fact that amazon (not even Bezos) re-invests a large part of the corporate income has nothing to do with distorting the US GDP per capita, as you claim. I would like to see a more solid argument.
One way might be measure his total net worth last year vs this year. You'd be subject to the vagaries of the stock market that way, but given that most of his wealth is paper wealth, that seems fair.
Certainly Amazon revenue is not the best way.
Amazon aggressively reinvests its extremely large and stable earnings into the business which Bezos owns a large part of and controls actively. Both he and his ex-wife have realized extremely important liquid wealth by selling a significant part of their stakes. How would you measure his wealth?