well i dont think tax evasion is a crime because taxation is theft :-P
The higher ups in the cartels are never the ones who gets arrested...its the good people like my friends who are just getting by doing their thing and not hurting anyone are the ones who get in trouble and have their lives ruined. many of them would go into a mainstream market and would not go to another life of crime.
Further, for the gangsters and cartels that are hurting people, yeah ..they should get in trouble for hurting people...but not for selling drugs
the guy who you get coke or heroin from might be cool but the guy he gets it from is not. El Chapo is in prison right now.
Furthermore anyone selling illicitly produced black market opiates intended for injection is selling a deadly poison to people, they are unlabeled and inconsistent and cannot be safely dosed.
They killed 60,000 people last year, that's pretty violent isn't it?