In personal wealth? Or does the wealth belong to the business?
Business investments or cash reserves or whatever are waaay beyond the scope of this discussion. That would have more to do with antitrust law and what a fair C suite compensation is.
If you started a small business and are wildly successful to the point that you, personally, have $7 million dollars? Then yes, you have too much money.
It's not "this is the amount of money a person starting from nothing can achieve".
It's "this is more money than any one person ever needs, regardless of where it came from".