The Mexican folks I know (not many) love their homeland, but have no love for the Mexican government. They are under no illusion that giving U.S. land to the Mexican government will fix the problem. Further, much of Mexico is a borderline narco-state, so the powers that be are mostly content to offload their problems to the U.S., take their pay-offs and live comfortably. They have neither a Lenin nor a Xi. They will take payoffs from a Xi, but not at the expense of their positions. Red China will happily make mischief here, but they will have their hands full seeking hegemony in the Far East.
The shortage of qualified mid managerial class in Mexico has, in fact, gotten so bad that corporations (such as the one that I work for) have had to send management in our ranks from the United States into Mexico to keep things operating. We are even trying to recruit production level workers from among the Central Americans headed north by Xiden's open border policies, but few are qualified and fewer still are even interested.