I believe that is Trump's plan.  Trump is attacking illegal immigration from many sides:  *the Wall,  *cutting off foreign aid to countries sending us their criminals,  *a win in the 9th circuit court saying Trump can deport asylum seekers to Mexico to await their trials, so even if they set foot in the USA they have to go back to Mexico or their homeland like decent people would do, to file for asylum from their home country at an American Embassy, and await the trial and decision. *And now this, getting decent wages for workers in Mexico kills the incentive for Mexicans to leave Mexico.