Were I an addict, I would very much wish someone would treat my addiction instead of enabling it by financially supporting me.

Currently substance abuse is either actively criminalized with enormous costs to humanity (probably millions dead due to the various criminal organizations participating in the trade of prohibited substances) or at best relegated to intervention reality shows.

Furthermore, treatment of most mental illnesses are very superficial nowadays, we have a few volunteer/charitable organizations acting as support systems, but mainly it's pills and some expensive counseling and you're good to go, right back into your old environment, old social circles, old habits, old context.

I'm not saying it should be state mandated, but it could be a lot more state supported.