Capping the ceiling would be a tremendous mistake. It would eliminate the "if" in your scenario. The same value in wealth would not be created. You would be massively disincentivizing people to stay here and innovate, and that innovation would flow elsewhere or simply diminish.
Luckily, we've never actually capped the ceiling, and it's unlikely we ever will.
I have never met a founder who was motivated, even in part, by the possibility of being a mega billionaire.
If there's no cap on a ceiling, is it fair or humanly okay when someone's wealth is Epstein-enough to own other people's lives? Wealth is a proxy for power, when someone has more power than legal systems or enough to swindle all of it, is that a better world?
There should be a ceiling or we reach the current state where accountability is nothing a million dollars can't buy.