I'm also fairly certain that, if these drug lords can afford submarines to use in drug transports.
The institutions of Mexico are rotten to the core, that is the problem.
The cops are corrupt, the "justice" system is a joke, they discarded their constitution after they were done using it as toilet paper, and the people living there invariably get the short end of the stick, while the crooks(politicians and drug lords alike) line their pockets.