This is great material for a bunch of teenagers protesting The Man, but how do you propose to keep earnings out of foreign countries? I.e., how can you ban a German subsidiary from holding the German profits?

How do you define "excessive earnings" or windfalls or other such garbage? Many businesses are cyclical, like venture capital and energy. If you tax away the profitable part of the cycle, they will shut down and tax revenue actually falls.

I had better stop talking or I will end up waving my cane and shouting about the Laffer curve.