I think you’re missing the point. I am asserting that 20m cap or capless, people including myself are motivated to try to be monetarily successful. The American dream is everyone is a future million/billionaire.
The current wealth distribution and lobbying only serves to make the rich richer and kick the ladder out from behind them.
A wealth cap changes that. It means there’s little point for the rich to keep clutching to power for more money, because you can’t keep it. But the goal of 20m is still very appetizing to the working class, where they could retire in comfort for the rest of their lives.