I don't see a problem with that if the value is taxed where it is created, eg via VAT.

US taxes us on capital gains. OP is asking why the same money is taxed twice. You have simply restated the scenario what OP is asking about. The question is why are corporations taxed , not, what would happen if corporations are not taxed.

You seem to be talking past the parent comment. Their point is that a foreigner can make capital gains on an American company without America getting tax money. Double taxation patches that up.

And why is it wrong? Either they sell and/or operate in the US - so US sales tax is paid and their US employees/owners pay their tax - or they do not, no reason to pay tax there.

The US doesn't have sales tax at the federal level.

Just to add sales tax is a State/County/Municipal thing. I just voted on a 1% sales tax increase for my county, for infrastructure, cyber security, and other public stuff.

That's something that could be easily changed.

It doesn't seem like anything could be easily changed at the federal level, especially something as unpopular as a tax hike.