Sincerely: Fuck no.
As a taxpayer, I want precisely zero cents of it going towards enabling drug addicts. I would sooner see my taxes burned on another Boeing Starliner.
Drug camps aren't really enabling drug addicts, it is just giving up on them and dealing with the humane problem of just keeping them alive for as long as possible as cheaply as possible.
But I can also empathize with your position, which is more what the Chinese do. Zero tolerance is given to drug addicts, and unless their families pay up for treatment, they are going to work camps until they die. With harsh consequences, people avoid that, even if they are unhoused.
I think this would work great actually, it will just never happen because it’s too easy to attack politically.
“You’re Japanese internment camping the homeless!” “You’re concentration camping the homeless!” “You’re gulaging the homeless!” Etc.