Gee, I wonder if having the largest consumer of drugs on the northern border contributes to this dysfunction.
That same northern neighbour whose ambassador is attributed as having a key role in the assassination of the ideological leader and president after the last revolution, and brought the country back into 4 more years of violence and fighting [1].
Or that same northern neighbour who swept in and took almost half its land after Mexico had just come out of a war against Texas and another against France.
Historically the US has been the prime benefactor of not only Mexico, but all of Latin America being dysfunctional, which is why the CIA has been involved in destabilizing the region for years.