Here is why I say give it free at clinics.
The illicit narcotics trade is an uncontrolled and unregulated market where extreme violence is motivated by the profit, which is incredibably huge.
Take away the profit, the violence greatly abates. Take away the profit from the street gangs, the violence abates. Take away the need to pay, the associated property crimes perpetrated by the users greatly abates.
This, of course, would most certainly get into to bed with those organizations that control the supply side of the equation but here is the trade off.
Violence goes down, personal freedoms go back up, the militarization of the police recedes, and the Constitution is restored.
The drug use is a morality issue, and we must not have the police become too ensconced in morality issues or we are on our way to the same islamo-fascist morality police like the Taliban used to have.
If people abuse the narcotics, they will do it a safe, enclosed enviroment where they will never have to commit crimes to support their habit. Nor will they have to spend time in a correctional institute that does nothing for them and indeed keeps violent offenders out on the street on probation status.