quora

Why is the United States paying a disproportionately large share of the NATO budget when European nations are extremely properous?

You laborate with two misconceptions:

1) in the misconception of presuming that the European states are "extremely prosperous";
2) of assuming that military power and supremacy are costless or have a price that can be billed in the name of the conquered nations as in the times of Sun Tzu.

If he had not been such a completely unfit idiot, Trump would know both.
Now: can USA afford their military supremacy or not?
In our time, if they can, they must pay the bill.
If not, stop whining about your impotence and get your shit together.