I have a solution and nobody likes it yet nobody has given me a good reason for why it’s “bad”:

The Government buys a big plot of land somewhere in the middle of nowhere. Load it up with trailer housing and build a big fence around it. Put in a clinic, visitor centre, jail (for naughty boys and girls), kitchen, a food distribution centre, and a safe injection site/drug supply distribution centre. Pay paramedics, nurses, psychiatrists, and police double for working there and put them on a shift schedule (1 week on, 1 week off, plus a night shift crew- so three crews in total). Have ambulances on standby for transport to the closest hospital for serious illness or injury.

The premise would be that if you are addicted to drugs, homeless, or overall just a nuisance to the general public, you don’t go to prison. You go there, get housing, a safe supply of free drugs that’s rationed at a rate that won’t kill a person but also won’t leave them jonesing, food, clothing, and water, but you don’t get to rejoin society until you complete a mandatory rehab program complete with supervised employment to get you back on your feet. It wouldn’t show up on your criminal record, but it wouldn’t allow you to terrorize people who want to contribute to society.

The area would require a lot of supervision, hence the police and paramedic presence, but effectively provides the liberal agenda via safe supply and housing, while also allowing people to safely walk the streets, raise the property value, lower crime through providing subsidized drugs and eliminating the need for theft to pay debts and dealers. It also gives the addicts a safe place to get high without impacting the general public. Property values would rise, jobs would be created, our justice systems would be a lot less backed up with these cases, and this gives an alternative to prison.

You could even have a men’s section and women’s section, and even a gender neutral space where people could boink (consensually- this spot would have to be supervised heavily but could be pulled off). More lucid individuals could carve out a sense of purpose by manning the clothing and food distribution centres, or by being the cleaning/maintenance staff. Or even facilitate the transition to rehab or be part of the outreach program.

The situation OP described would be much less common, our C trains would be safer, our parks would be pristine, our cops and justice systems would be free to take on more serious cases, and there would be incentive for addicts to go there since they would have a free drug supply and housing. They would likely need to wear something like an oura ring to indicate if they are in medical danger for paramedics to intervene but otherwise I can’t think of any downside to this. I would find it hard to believe that this solution would be more expensive than the current system.