[helloworld11]

Aside from other complexities and negative consequences of your hypothetically proposed wealth cap, you forget that the world isn't a pie from which wealth is taken by some at the expense of others, at least not in many of the ways that create wealth on the market.

These billioniares and many more millioniares worth more than 10 million dollars by and large create their fortunes through certain lucky or careful investments and in the case of many of them, their wealth is locked up directly in stock that the public values highly enough for them to be worth that much. As many here have pointed out better than I will now, creating confiscatory policies on this would lead to the wealth itself mostly evaporating as if it never were. What you propose is in this sense a tired, economically irrational and self-defeating idea that tries to be the real world equivalent of the proverbial farmer and his golden goose.

Also worth mentioning that the total wealth of all the world's billioniares today amounts to 13.1 trillion dollars, give or take. The U.S. government alone spend 8 trillion just on its wars in the middle east and Asia between 2001 and and now.

This is only one example out of many of government funds being spent rampantly, in amounts that dwarf the wealth or annual income of the world's billionaires but with little or sometimes even negative productive results. And you'd like to confiscate these very often useful private sources of productive wealth to government bureaucrats that already receive trillions in tax revenues annually but somehow can't seem to make them definitively improve the world?