[_delirium]

Yeah, I'd support making it both easier to leave the U.S. as well as to enter it--- make both renunciation and green-card procurement easier. I think the U.S. would come out pretty well on overall balance there, because it's a fairly popular place to live, and is artificially keeping out many people who would like to live there.

The evidence I can find is that the outward flow is a trickle rather than a flood (or even a modest current), though. Even if the 743 number is a 5x underestimate, that's still not much. I'm not sure it even balances the rich people flowing the other direction, e.g. the businessmen getting green cards under the ">$1m to invest" criterion (and no doubt there would be more of them if the green-card process were streamlined).

I don't think the U.S. is particularly unique in making it hard to renounce citizenship, though perhaps it's for different reasons. Many countries make it very hard to renounce citizenship if they think you're doing it to get out of mandatory military service, for example. For economic reasons, many require that there no longer be any links with the country, e.g. you can't renounce German citizenship if you still own businesses or property in Germany. France seems to have an additional timing requirement, where you can only renounce French citizenship within the first year after acquiring a second citizenship, so dual nationals can't decide 10 years later to leave the country and renounce the French citizenship.