@To-Whose-Benefit?
That may "work" in theory, but the political reality is that you are never going to get "let them die on the streets" as a national policy. So what you're really going to get is legalization, plus a government economic/medical safety net.
Obamacare which requires treatment/rehab coverage already provides the safety net. Which invites an incredible amount of charlatanry in the rehab/treatment sector, medication, etc. Which isn't free.
Which means the productive members of society are going to pick up the tab--repeatedly, because the recidivism rate is huge. When multiple family members are involved, it's even higher.
We won't just be paying for the projects they got addicted in, likely for them to get addicted, but for them to go through multiple cycles of rehab.
Let's head this off at the pass. Stop subsidizing poverty.
The political dynamic is such that the more widespread the usage, the more people have family members/friends who have drug issues, and the more likely they are going to support drug rehab centers, etc.. That's the exact dynamic that is happening here in Ohio.
I'm all for rehab, but that is only part of the picture.
Without some sort of cultural pushback, why bother? Without up front consequences of drug use, what is to deter people until they are physical, mental, and psychological wrecks?
Keep the laws against it. Legalization is a step in the wrong direction.
Obviously, mere peer pressure in the spawning grounds of social problems is not going to be enough. We have 50 years of experience which shows things do not get better, they only fester until the very people who have been supported in their continuing malaise resent those who have shelled out to support them.
Frankly, I think we all could have lived better, with less inflated currency (one way to get out of debt is to inflate the currency and then pay the debt off in devalued 'money'), less crime, and those we supported all this time would have had to stand on their own two feet--a fine incentive to become skilled, educated, and develop a work ethic. Funny how hunger can be a motivator.
Instead, we have the fattest and most ungrateful poor people on the planet, who ever demand more, and hate "whitey" and all those "oreos" for holding them down.
The problems are not independent, even though reasonably well to do kids get addicted, too, but part of that comes from the boredom and lack of parental supervision in a culture where two parents work for material things and to pay the taxes that support the people who are dealing drugs to their kids.
The solution is not tacit cultural or legal acceptance of drug abuse. By all means, make treatment an option, rehab an option, but limit it to those who want to quit. The success rate will go up, recidivism will go down, because those who have no desire to quit will not be using up the resources needed for those who do.
One of the reasons AA has limited success is that people in court ordered rehab are putting in their time, doing the requisite number of meetings to satisfy the terms of their sentence for an alcohol related offense. They'll go to meetings fresh from the bar and whine in front of the counselors about how they slipped and want to quit, and promptly return to the bar after the meeting. That makes a program that is effective among those who genuinely want to become sober less effective, and putting people in rehab who are determined to return to the behaviour that put them there is a waste of time, rehab slots, and resources.