Drugs are easy, but you would have to be able to run books to fix it, maybe in Vegas. You set up a site where you post pictures and a bio of the drug addict. People then place wagers on how long you think they will stay clean and build odds based on that. Said drug abuser gets a cut of the house at 3 months, 6 months and a year and has to submit to drug tests during that period. This cut allows them to rebuild their life and gives them a hell of an incentive to get clean. If they relapse the remaining cut of the house goes into a pool and get's distributed to the rest of the drug addicts that are still on the road to recovery and ups their cuts.
It's a win-win, you don't feel like you are gambling if you loose because at least your money is going to a good cause, and if you do win well you still put money towards a good cause. As well you are building an incentiveised safety net for some of the most at risk people.
I'm sure you're joking, but in case you're not, an FYI: this fundamentally misunderstands the reason people use and abuse drugs, and especially why they don't get clean. It's definitely not that they don't have sufficient incentive.
This is an idea that I disagree with so thoroughly that I'm having a hard time articulating why. Every angle I can think of presupposes a world view which would not admit this idea in the first place.
It's a win-win, you don't feel like you are gambling if you loose because at least your money is going to a good cause, and if you do win well you still put money towards a good cause. As well you are building an incentiveised safety net for some of the most at risk people.