I keep thinking of this event that happened to me in the UK, where laws are equally useless at preventing theft, and staff are just powerless to do anything about it. I chased down a shoplifter. I cornered him in an alley. He stopped, looked at me, and this brief conversation took place. (and nobody ever believes me, but I don't care; this really did happen)
Him: What are you doing?
Me: I'm chasing you
Him: why?
Me: Because you're a fucking thief!
Him: (confused)...nobody's ever done that before.
Me: (shocked) ... well, I AM, so fucking run!
He dropped the bag (which contained mostly expensive meat and cheese and some other expensive-ish items - apparently really common theft targets) - and ran off. I took the bag back to the store.
Now, I didn't give a shit about a 100 pound loss to Tesco, but if we've completely given up on the rule of law, I'm not sure that's a society I'm happy to live in.