I feel that eventually somebody will crack the problem of how to reward people for beating capitalism. Various zillionaires have said that at some point money ceases to be a motivating factor. They’re driven by other things, and by the time they personally become super wealthy they’ve already achieved all the things that are going to benefit society. Further wealth accumulation beyond that point wasn’t their goal, and I really don’t think a wealth cap would deter those people or deprive the world of their achievements at all.