[throwaway34241]

> You would also likely need foreign cooperation. There's no reason to believe a corporation headquartered in the U.S. needs to be truthful about their foreign revenue

If I understand it right, you actually wouldn't need this much. Foreign revenue would be the other countries' responsibility. So the implementation would look something like a domestic VAT coupled with deductions for domestic expenses. It's true that the US doesn't have a VAT but that's been well-tested in many other places.

Agree with your conclusion though, they've got to prioritize how much time / political capital they invest into each issue and putting a huge amount of effort into this sort of thing (when it went nowhere recently and would likely go nowhere again) probably would be a mistake.