My view is that any government that seriously wished to put the Colombian drug cartels out of business would just legalize and regulate these drugs. Providing the users with the freedom to choose and a method of insuring they're not getting a tainted product from some street corner scumbag. The cost savings in law enforcement alone would pay for the infrastructure to regulate it. If a user wants to commit slow suicide with addiction, that's their choice isn't it?
As long as these substances remain illegal, the cartels get rich and the populace pays for it through their taxes. Makes a body want to...
It's just not fair to the cats.