You make it seem like corporate tax rates have nothing to do with the earnings of the wealthiest families.
Set aside the fact that our baseline corporate income tax rates are some of the highest in the world.
The income of corporations doesn't go directly into the pockets of the shareholders. Rather, the shareholders are getting income from them either as dividends or as capital gains. Either way, that's accounted for in the income of those shareholders. So corporate profits are already built into the numbers I quoted above.