She’s correct, as always.
Ok then tell me why then would Bill Gates or Jeff Bezos be incentivized to grow their companies if their Net Worth was capped by the government at 1 Billion dollars.
I can't speak for Bezos, but I'm pretty confident Bill Gates wasn't thinking about his theoretical maximum net worth when he started Microsoft. He really is in it for the love of the game.
At the same time, if more billionaires spent their money like Bill Gates, they probably wouldn't get as much pushback from us pleebs.