Cartels would continue to exist though. Because there are always other illegal services that need to be provided. Prostitution, gambling, murder-for-hire, merce

Cartels would continue to exist though. Because there are always other illegal services that need to be provided. Prostitution, gambling, murder-for-hire, mercenaries, unlicensed surgeons, as well as a still-extant illegal drugs market because they are merely cheaper, or sold to those who cannot buy the otherwise state-approved drugs(underage, banned for some reason).