Warren is free to do whatever he wants with his money. He's old. He's never gonna run out.
What he is advocating for is putting a lot of other people at risk.
And that, in my opinion, is the height of arrogance. He got very rich under the rules he now proposes to change. I believe he is either trying to make it more difficult for anybody to surpass his accomplishments in the future, or pulling the same kind of stunt that Andrew Carnegie did near the end of his life. Legacy insurance.