their countries?

Sorry, I don't buy this argument. Very few are, most won't even be able to get a decent job in their native countries. I'm not saying they're useless, but they won't dream of 1/3 of the salary they get here.

Anyway, the salary gap is a complicated topic in this part of the world. The bottom line is that if any country is really serious about economical development and getting the best of their expats, irrespective of their countries of origin, they really need to rethink the whole process. Until then it's all a big show ... with no substance and no durable development.