It will be gamed because the motivation is much greater than just money, it's to feed an addiction. Crime by crack addicts aren't the only problem, the self destructive behavior when you're addicted to heroin and cocaine are also dangerous. I'm libertarian in terms of drug decriminalization and all that but I don't think a segment of society will ever be able to deal with hard drugs in a responsible way like that.
I'm sorry for the late reply, hope this reaches you anyway.
First, the point of this is the decouple addiction from money, and with that from crimes of enrichment. I'm sure we can agree that addiction is the root of this issue?
Second, this would only be offered to those already addicted. Once the illegal drug trading collapses, so will the "first hit for free" offers, since those are based on the expectation that the receiver will become addicted and be a returning customer. This is, as I understand, the primary way of getting addicted (very few would-be heroin users sit a home Thursday afternoon and decides that today is the day to try a hit).
I agree that drug usage is destructive in so many way, and I've come to realize that my solution isn't really to help the users -- strategies to help the users have failed over and over again -- but rather to contain the problem, and cut the causes as close the root as possible. Once that part is complete, we can look at getting people into rehab -- which should also be more effective when you old neighbourhood isn't full of pushers whose business depends on getting you back in the habit.
