I don't think I will ever understand those who succumb to the moral depravity of theft and how it is routinely marginalized by others. There is a collective lack of shame which would do well, in my opinion, towards correcting theft problems.
I think it starts when we decide (as a society) that some crimes are "victimless" and thus more acceptable - embezzling/white collar crime come to mind. From there, I believe it is not a far jump for a thief to claim that although not victim-less, the person was less of a victim because the victim can afford, or has insured, the loss, or because the amount was "minor" - by some twisted measure. I know a fellow whoembezzled several hundred thousand dollars from his company, through the payroll system. He was caught and convicted, went to jail and then sued his employer for his 401k money - much of which was a portion of the stolen money. He showed no remorse and generally didn't seem to see the theft as a big deal.
Almost worse to me are the people who steal the little things. I had a neighbor who used to steal my sunday paper every week - a complete violation of the social compact. It went on for a while, but I eventually fixed his wagon (that's another story, though). It bothered me terribly that this fellow saw fit to steal from me for the sum of a dollar a week and a walk across the street. He apparently thought that this theft of a "little thing" was acceptable. For me, it runs in reverse, the person who will sacrifice their reputation and accept the label of "thief" over a single buck would be more than happy to steal much more from you if he thought he could get away with it.
Unfortunately, thieves come in all shapes, colors and sizes. They are like us, but lack something - I don't know exactly what - an understanding of community I guess - and that can afflict anyone - a Grinch. Maybe the scarlet letter wasn't an entirely bad idea.
Anyway, off the soapbox,