Back in the 90s one of the non-trad magazine (Hustler, or Playboy I can't remember) did a n analysis of hard line anti-drug legislators and found drug money in their campaign contributions. If I remember correctly Doonesbury even did a comic about it. The drug runner have nothing to gain by legalization. With 48 perent of the current incarcerated state/federal population simple possession (no property or violent crime history) the system (unions, law enforcement, courts) have nothing to gain by legalization.