The Drug Problem
The conservative approach to the drug problem is that "You have a problem with drugs and if you don't fix it the government will come down on your head". They call this going after supply.
The rational approach to the drug problem is that the only drug problem is that government thinks there's a drug problem. There is no actual drug problem.
Government supports a criminal market system which supplies drugs. If we allowed a free market system (or a regulated market might be better) they would be cheaper, safer, and the only problem would be finding productive employment for all thosw drug warriors who'd be freed up to do stuff like make cars.