Prop 47 and SF's "criminals are oppressed by society" approach to crime are to blame here. You can't get the grunts to roll on the bosses if all you can charge them with is a misdemeanor, and you can't get police to even arrest thieves if the DA refuses to prosecute.
This doesn't happen in other big cities like NYC, Boston, Chicago, etc.
This doesn't happen in other big cities like NYC, Boston, Chicago, etc.