@Markerrag -- good point, but you are leaving out one thing. Are companies really reducing the price of their goods because of lower labor costs or are they charging what they would have, anyway?
Also, there is no reason to think that the great disparity in wages will last forever. As economies mature, workers demand more pay for their labor. It may be that globalization will make that process quicker, just as it has made sharing technology and goods easier. The days when nations could focus on the economies within their own borders are over and we are working through what that all means.