Re: A: I was talking only about the relative effects of a single change: eliminating all tax haven locales at once. The likelihood that exactly zero of those displaced companies would re-domicile and shift revenue to the US, SabOx404 notwithstanding, is basically zero.

Re: B. You're absolutely right. I didn't think that all the way through to absolute effects. For me personally, it would certainly be negative, so I clearly blew it here. Upvoted.