the 'caravan' and overpopulation

Of course the mainstream media would never admit to this, but a big reason why these people from Central America are heading toward the States is that their countries are overpopulated. I heard an interview with a young man from El Salvador in this 'caravan.' He was complaining that there weren't enough jobs in his country. No, the problem isn't that their aren't enough jobs; the problem is that there are too many people! These countries are overpopulated, but that's their problem, and it's a problem they should recognize and try to do something about. These countries are simply trying to export their surplus populations, but we have no ethical responsibility to accept them-- and we shouldn't.