People like this is why there are wars in the world. Selfish, unfeeling, uncaring, unthinking, heartless buggers who only care about themselves and how they can get more for themselves. I'm surprised these people aren't already wandering through stores looking for opportunities to steal something unattended, or pull a scam to get something half price (anyone remember that Chipno episode?)
The more people that believe the selfish credo: "finders keepers losers weepers" the more the world becomes a dark and terrifying place filled with scum instead of humanity. But then, it is man's nature... born to evil to do evil.
That story with the lady's grocery money was a good one... you can either save the day and allow her to buy groceries for her family, or be a selfish pig and keep the money, leaving the woman and her baby to suffer with not only a lack of food, but also the anguish of having her money lost/stolen. Does it make you feel good to hurt people? To ruin their lives for a while? If so, congratulations- Satan's got you wrapped around his little finger.