No cost/benefit analysis of injection sites is complete without a cost/benefit analysis of all our drug policies.

There are four so-called "pillars" or drug control; law enforcement, prevention, treatment and harm reduction. We allocate about 80 per cent of our drug control budget to law enforcement, about 70 per cent of that to cannabis law enforcement and about 70 per cent of that to busting cannabis consumers for possession. We spend about 15 per cent on treatment and 2 per cent on harm reduction. The rest is spread thin across education, prevention and research. 

There is no evidence that law enforcement has any redeeming value whatsoever, nor even a mechanism in place for measuring the costs and benefits of law enforcement. Meanwhile, law enforcement competes and interferes with the other pillars.