Pay too much attention to common sense and you will find yourself believing that the sun revolves around the earth; it's good at spotting correlations, but when

Pay too much attention to common sense and you will find yourself believing that the sun revolves around the earth; it's good at spotting correlations, but when you want to understand actual causes, you need research. I can see as well as you can that crime, poverty, and public drug use are related - but research shows that your intuitive explanation of causality is backward. It is housing policy which causes homelessness, which causes desperation, and desperation causes addiction - but does addiction cause crime? Not so much as you'd think: drug addicts are more likely to be victims than perpetrators of crime - which is mostly a function of poverty, a consequence of economic policy. When someone focuses on public drug use as an issue, they mistake an ugly, visible downstream symptom for the actual disease. It is a matter of unpleasant appearances, not the meaningful problem. Trying to eliminate public drug use by focusing enforcement on the people who are using drugs in public is a cruel and pointless game of whack-a-mole, so long as the policy engine which creates those desperate addicts remains in operation.