That is what is fueling all of this.
The cops love it, the courts love it, the prison contractors love it, and everyone else making a great living off illegal drugs loves it.
These cartels are probably threatening the politicians with death if they even so much as suggest legalizing most of the drugs they traffic in.
These groups have made billions in dealing illegal drugs. They have no desire to see their golden goose killed.
In addition, I'd bet the rent that there are a more than a few politicians being bribed, and making big money off this charade.