[ClumsyPilot]

"when you decrease the supply, prices tend to go up and access goes down."

Basics of economics: inelastic markets, where demand does not respond to price. Oil and food are examples: the price moves, but goods must be moved, and people need food to survive. So price could double and demand would go down like 2%

Seond issue with your post: there is no shortage of supply, all drugs i can thing of are readilly avaliable. The police / etc. Have failed to restrict supply. The only thing they can do is drive up the price as cartels / criminals have to employ more elavorate methods.

You know what else drives us the price? Taxes. You could set insane rate of tax on any substance so that it's legal version costs as much as the black market one, or even more. Legal one still nakes more senxe to buy, because you'd know its pure and does not come with baking powder, horse shit or rat poison mixed in. Its a well known fact that drugs on the street are of very low purity.

In fact it is very common for a drug user to die because they suddenly get a dose of 'clean' drug and what used to be a normal dose of 10% drug just became a 10x dose of 100% drug.