If you think about it, most of the inequalities in the United States derive from the fact that it lets in millions of new people every year. They come because they believe it offers opportunity. They will not all succeed but they are, broadly speaking, right. When such people start out, they are usually poor. It is inevitable there will be a huge gap in American society between those who have just got across the Mexican border, and those who have already "made it". But that need not be a problem so long as the opportunity is real. The wretched of the world still seem to think that it is.