You 'knew' one crim hey? So what's it like inside, estcove?Longer sentences are effective with some types of crims. Habitual thieves for instance. The more time they spend inside the less opportunity they have to steal. Not only that, but as they get older the prospect of doing a long lag does deter them. They are slow learners though.
An interesting point about the shop claiming insurance. I knew one crim who burgled a house and stole alcohol. Some full bottles of spirits and some partly used. He discovered that the owner claimed and was paid $2000 in compensation. He was outraged because he reckoned he'd only got a couple of hundred dollars worth. He did three months. In his mind the owner was a bigger crim than him. That's how they think.