I am sorry, but what is the problem? So somebody already pays crazy taxes in their home country, then pays rent in another country (including taxes), sales taxes and likely spends much more than locals in the foreign economy. The foreign taxman gets a wind of possible more money, starts taxing those folks on top of what they already pay and they just move out, spread the word, weakening the economy further. If they overstay 180 days or whatever is needed for a tax domicile then yeah, they should pay taxes there, but with the current tax regimes that might not be technically possible. What prevents folks to stay 179 days in Mexico and 179 days in Costa Rica?