Corporate globalization is the culprit.
The corporations are simply blackmailing the workers by threatening to take their jobs elsewhere. The brain drain caused by attractive opportunities abroad will ultimately find most Third World countries in a downward spiral where ignorance and corruption feed on each other. Immigration, on the other hand, leaves little chance of the immigrant returning to his homeland while he is still productive. Few Americans may realize that little to no financial aid is available to assist international students who wish to attend U.S.-based graduate programs. Globalization of business should lead to globalization of opportunity.