Why are migrants not only the winners but also the big losers from migration?Also speaking about wages and immigration, ABC/Fusion adds: "for black workers in particular, there has been evidence that immigration can depress wages among certain sectors of the workforce."
The answer is that those who have already migrated lose, at least in economic terms, through the subsequent migration of others. Migrants lose because they compete with one another.
Reihan Salam has a rather extensive set of comments about the economic effects of mass "low-skilled" immigration.