High skilled, (comparatively) rich, healthy knowledge workers will leave the place they reside, move somewhere like Dubai (no tax, few free public services - doesn't matter they're not going to need them) to work for a company based - on paper, somewhere similarly - meanwhile the sick, aging and destitute back in the old country depend on tax-funded public services that have lost their tax base.
I don't know what the solution is - but it's something I think needs to be considered. Conversely, people might want to move the other way (say to the nordics), but, I'd wager it being heavily skewed in the first direction.
Of course, it also has a dark side such as no real social support net or anything (criminals, the sick and unemployed can just be deported), but the people moving there don't need that.
Yes of course, society, solidarity, etc etc - but in the past that model kind of worked because people didn't really have the ability to just pack up and go - whereas now they can just bring a laptop and their credit card and have a plane ticket, airbnb, leased car and new, and to them better, life with barely any effort.
I guess in the US people can fly for this too. Does anyone do "work anywhere but must be in the same state"?