I'm don't blame you for the way you think, as I use to have the same mentality before becoming an expat, but your thinking is a bit flawed.

Regional salaries are abysmal to U.S. wage standards for professionals, but to other people in less fortunate countries, its a step up in their living and wage standards. Especially if jobs are not plentiful in their country! Plus its a lottery ticket to live in the U.S. I've often wonder why people would want to relocate to the middle east. Yes the money in the middle east is good for professionals, but what about the labor workers making 300-500 USD/mo in conditions that westerners would consider unhealthy work standards. And living conditions definitely is not for the faint of heart either! OSHA would have a field day here!

Well...the reason they relocate, it is a step up in their living standards and although 300-500USD is well below poverty standard to us Americans, its actually enough money to pay what little they here and send money back home to their families. Of course they find extra work washing cars, babysitting, private taxi, etc to bring in extra cash. Seems awefully familiar...hmmm (....Mexicans?!?)

So you see, its not a far stretch to the imagination that it may come to fruition.