$500 billion is a sizable chunk of that $6.3 trillion, and it’s still only a 25% tax rate, and then only the “ultra-rich.”
If one considers something more reasonable, like a 70% tax of income over $100,000, then you’re talking about more substantial amounts to really start catching up to top economies.
Discard the Brownshirts, their collaborators, and the Putin fluffers, and you probably won’t have many choices left.