I think this is a slippery slope. Drug legalization shouldn't be about reducing harm to optimize cost effective economics of keeping people alive. If that were true then you would have the power to outlaw anything that isn't healthy in the name of saving public tax dollars. Cigarettes. Soda. Deep fried foods. Watching too much TV. Sky diving. etc.

Drug legalization is about using public funds on other issues besides individual drug users, reducing prison populations for non-violent drug offenders, offering those in need treatment instead of incarceration, removing an income stream for gangs