Thank you for the background. The political class of Mexico seems to have a whole lot in common with our political class.
The reality is that Mexico doesn't perceive the high rates of immigration(legal and illegal) as permanent. That they are not giving these workers to the US, only loaning them.
In time, Mexican economic/political reform will go forward. Mexican economic opportunity will increase. The Mexican birthrate will continue to fall. Eventually, the will be no Mexicans available to immigrate and Mexicans will begin returning to Mexico.
This concept is widely accepted among demographers.