Conversely, few if any people need rehabilitation for softer drugs, which pads the coffers for the worst abusers of the most addictive drugs. It also doesn't begin to compare in cost to imprisonment, which is incredibly expensive and paid for by taxes already.
And no, no problem can be solved without a LIBERAL solution, because any CHANGE is inherently LIBERAL when the only alternative is CONVERVATIVISM which is MAINTAINING THE STATUS QUO.