"If the U.S. or another wealthy nation were to see a sudden large increase in immigrants from these countries, it's possible that the new populace will vote for bad policies in their new home."
Then perhaps the solution is to not give them the vote, at least at first. Here's an example: Australia decides to set up a new city on an isolated part of its coastline. It accepts very poor immigrants from anywhere and pays them very low wages to work in factories. They cannot vote for 20 years and cannot move to any other part of Australia, but they can choose to return to their country of origin at any time. The city is administered and policed by Australians.
The idea is to repeat the experience of Hong Kong where British rule mixed with cheap immigrant labour produced very rapid rises in standard of living. It's basically the same as the Charter Cities [1] proposed by Paul Romer, except that the city is located in the rich country rather than the poor one.
Then perhaps the solution is to not give them the vote, at least at first. Here's an example: Australia decides to set up a new city on an isolated part of its coastline. It accepts very poor immigrants from anywhere and pays them very low wages to work in factories. They cannot vote for 20 years and cannot move to any other part of Australia, but they can choose to return to their country of origin at any time. The city is administered and policed by Australians.
The idea is to repeat the experience of Hong Kong where British rule mixed with cheap immigrant labour produced very rapid rises in standard of living. It's basically the same as the Charter Cities [1] proposed by Paul Romer, except that the city is located in the rich country rather than the poor one.
[1] http://chartercities.org/concept