High cost and a lot of ways to go wrong means that it isn't worth it. One of the ways it might go wrong is that only the poorest socioeconomic class takes this

High cost and a lot of ways to go wrong means that it isn't worth it. One of the ways it might go wrong is that only the poorest socioeconomic class takes this option, taking almost no business with them and adding very little of value to the economy of the country they are transplanted into. What they will bring is all the inherent troubles of integrating a displaced people into a different culture, such as racism and just tribalism in general. It's not worth it for the country they are transplanted into and it's not a given that it will be worth it for the people moving.