there are no stats to show immigration leads to lowering of wages - for the simple reason that it doesn't. there are some stats that indicate it slightly decreases the rate of wage rises, but that's not the same thing. baldies attempt at a point re remittances doesn't actually make sense. Research shows that more money is sent 'home' by overseas workers than they would have earned if they had stayed there. the fact that irt is sent to those workers' families makes no odds - unless baldie thinks that if they stayed at home those same workers would jsut dish the dosh out to anyone passing by.
and of course you are right chilango, that the cause of the massive disparity between the rich and the poor nations is naff all to do with migration, and everything to do with an economic system that ensures the 'third world' remains impoverished. even baldie recognises that fact (occasionally), he just thinks that those suffering most from its ill-effects must put up with their suffering until good liberals like himself sort it all out.