[danteembermage]

I think a reasonable metaphor for thinking about this issue is to consider a grocery store, where is aisle represents a different kind of income and each store represents a different country. If prices get too high in one aisle, shoppers that spend a lot of time in that aisle will switch stores if they can afford the drive. It seems like both people and politicians tend to focus on the "earned income" aisle because that's what people are familiar with. That serves as a nice area for politicking because they can "tax the wealthy" without actually hitting the real donors in any meaningful way since most of their income comes from other sources. At the same time corporations and high net worth individuals are more than capable of leaving, hence the double-irish, etc. If they go, tax revenues go to 0 rather than small, so it would seem to be in the strategic interest of the United States government (assuming we want to maximize revenue which is probably not the goal but will work for this purpose) to be the lowest tax domicile for that kind of income, but just barely. That way we attract wealthy individuals but still "extract" the maximum feasible wealth from them. I really don't like the adversarial nature of this kind of thinking, but you have to at least admit that people are corporations do venue shop. If that's not brought up at all, someone's being naiive, or more likely, disingenuous.