Billionaires should not exist. You don't get to be a billionaire without exploiting people - for that matter once you get over about 10M you're probably stepping on people, or exploiting systems, in order to continue growing your wealth. And why, exactly? It's a sickness that gets worse the richer someone gets. It's been studied and confirmed that people who have excessive wealth convince themselves that they deserve it, they earned it individually, and that they are special and more valuable than others. So instead of riding off into the sunset, they feed their addiction by buying outsized and unearned power in order to shape the laws so that they can make more money. Just fuck off already - you won at capitalism, now get the fuck out of the way and stop screwing over everyone else and making our lives miserable.
Beyond 100M we should just take it all for the state. 100% tax rate. If you want to keep earning beyond that, then great, you will have the glory of contributing to the public good.
But since billionaires have convinced idiots to advocate against the idiots' own interest, and argue that the billionaires can't be constrained in any way, then this will never happen in the current social context. So next best thing is to do as Bill says. Put the fear of God into them.
Musk won't finish in your mouth you fucking bootlicker. Stop asking.