This libertarian would be happy to see the "war" on drugs ended, immediately after the welfare state is dismantled. I'd rather finance the war on drugs than finance the colossal medical and "rehab" bills, and all the cost of crime, incurred by people who freely choose to destroy their own (and sometimes other people's) lives with drugs (including alcohol), and then present themselves to the taxpayer, over and over again, with the plea "I need help".
I don't see the the reason to finance any of this. With prices so cheap were certainly making no effect on supply.
Decriminalize the crap ...but hang the dealers. ...and when people hit bottom.
AA is free.