My attitude towards Drug Dealers is quite simple:

If they are dealing to support a habit then they get jailed.
If they are dealing to make money then they get hanged.

When it comes to hardcore addicts we should either:

Contain and control their habit by prescribing a controlled amount to them (which would come with enforced conditions with regards to conduct, where they live, place of work, probation etc)thus keeping them out of the dealers hands.

or,

Employ the "foot and mouth" option.


And yes, I expect that to upset a few people....