Fair enough and a good point.
Random anti-aircraft gunning of anyone without a job - on drugs or not.
And to counteract the potential drop in employment caused by the shrinking consumer base into which to sell product & service you could enforce immigration from drug-free and hard-working cultures. Bring em over in chains if need be.
You say this is a solutuion - I'm sure you're being ironic, not serious.
But I don't say there's a solution, I say there's no solution, and certainly not through anything as unimaginative as legalising or criminalising drugs or anything else.