And here we have the identification of a large proportion of the basis of crime. The war on drugs is a massive failure (but money spinner for companies that profit from high levels of prisoners at tax payers expense). Do we currently keep class A drugs illegal on the basis of morals or profit? I suggest the latter.
What causes the greatest harms to society in moral and economic cost, class A drugs available in a free market dispensary style as is now the route for cannabis? Or maintaining a black market with high levels of criminal activity and the criminalisation of otherwise innocent users?
Take the morals and the profit out of the equation and surely that must be worth a try?
Right now drugs are connected with a vast percentage of other types of crime. Its hard to see reliably if drug users -
a) were good citizens who turned to crime in order to fund an addictive drug habit they couldn't escape or
b) were good citizens who just turned to crime (while enjoying a drug habit) or
c) were criminals (who developed a drug habit) or
d) were good citizens forced into crime because their drug convictions made it impossible to earn money legitimately or
e) were good citizens forced into crime because their drug habits made it impossible to hold down a job to or
f) were criminals who saw a way to make easy money producing, smuggling and supplying drugs, while enjoying a drugs habit or
g) were good citizens who just enjoy using drugs and never committed a crime in their lives.
Legalising some drugs would help persons in categories a), g), maybe d) and maybe e).
I don't see why we should do anything to help persons in categories b), c) or f) and I'm not convinced I should lift a finger for those in d), e) or g).
However, the links between drug use and other types of crime are so strong that its easier or the police to e.g. detect e.g. burglars when they find them buying / carrying / selling drugs. So there's an advantage in crime control from using drugs to flag up people who are up to other stuff too. Positive that drug searches on person or at property or cars have produced a vast haul of weapons, stolen goods, stolen cards, links to all sorts of crime.
On a national scale, obviously increased use of narcotics, legal or not, is counter to a stable, healthy and productive community.