I think you’re arguing at a cross purpose; Eugine is, I believe, suggesting that there are other potential costs; for example, the -politics- of immigrants could cause problems. Suppose, for argument’s sake, that socialism is the best economic system (you can easily reverse this argument for the sake of argument; I’m a laissez-faire capitalist, so I’m choosing a hypothetical that fights me); if laissez-faire capitalists immigrate to a socialist area because it has more opportunity, their subsequent demands for economic reform could destroy the very economy that brought them in to begin with.
I think you’re arguing at a cross purpose; Eugine is, I believe, suggesting that there are other potential costs; for example, the -politics- of immigrants could cause problems. Suppose, for argument’s sake, that socialism is the best economic system (you can easily reverse this argument for the sake of argument; I’m a laissez-faire capitalist, so I’m choosing a hypothetical that fights me); if laissez-faire capitalists immigrate to a socialist area because it has more opportunity, their subsequent demands for economic reform could destroy the very economy that brought them in to begin with.