-Microsoft develops product in U.S, generating tax credit for R&D.
And paying salaries to U.S. employees who pay income tax on it and spend their money in the US, thereby also paying US sales taxes.
That is so incredibly irrelevant. We're talking about the taxing of one legal entity, don't try and push the conversation to knock on affects to other legal entities.
Oh, what the heck, let's talk about those other legal entities. If Microsoft paid all of the taxes from revenue generated in the US, those employees would have a lower tax bill, and could have better lives. As a matter of fact, perhaps all citizens of the US would have a lower tax burden. That might really help those who are just trying to find a way to eat every night.