I would think that legalizing drugs and using the money we spend on the WOD on rehab for anyone who wants to quit. (As well as tax revenue on legal drugs.) I don't have any numbers, but that has to be MUCH cheaper in the long run than spending all this money on WOD, courts, jails, etc. Heck, just legalizing pot and letting the people who are in jail for pot out would save a ton of money.
I don't carry a gun to go looking for trouble, I carry a gun in case trouble finds me.