I didn't know so many people shoplift; maybe it's different in Brazil, or maybe I'm just not aware of how much shoplifting goes on. But if a lot of people shoplift, I'd say it's because they lack integrity or values...they only do the right thing when there are consequences to doing the right/wrong thing that apply to them. In the case of shoplifting, as long as you're confident you won't get caught, there's no consequences to them personally.

I guess it's possible that they also just want to 'stick it to the man'; maybe they hate the corporation because they know corporations are evil and profiteering and wealthy, so they don't feel bad about stealing from them, but I wouldn't necessarily give them that much credit. Also, they may fail to realize that it could be someone lower on the food chain who has to eat that loss who isn't filthy rich.