Population of where?
If only there were organizations responsible for populations that could determine this locally for places in the world. Guess we just got to take a "world vote".
In those local places where you have made the ultra wealthy illegal, you have also discouraged them to invest in your locality. In other words, you shot yourself in the foot.
You can make the cost of doing business in your country that they have to be worth less than your cap.
But the effect of this is actually that we would realize we don't need the ultra-wealthy. We would likely do better because it would be a significant downward pressure on inequality in the countries that enforced it, and more people would have opportunities to make it big.
If there are going to be ultra wealthy, then yes, locales benefit where they invest.
> You can make the cost of doing business in your country that they have to be worth less than your cap.
Correct, so they just don’t do business in your country and do business with the countries elsewhere that are happy to accept their investment.