They just don't.If you tax rich people too much they will just move their companies off-shore
All those who can do it have already done it. All online businesses did it.
For others, they move their workers but keep the company in the country as it's too complicated.
We should not over-tax rich people. We should tax them to the same ratio as the middle class.
The middle class is currently shrinking in America. And that is a huge problem. That will eventually affect the rich as well.