i work in security in a major supermarket/shopping centre. vast majority of shoplifting is done by seemingly wealthy people.
had a case just before crimbo, a woman walked in, put 6 bottles of perfume in her bag and walked out, as she left the building she was arrested. from her gucci bag she produced 6 bottles of perfume, a rangers shirt with security tag still in it (not from shop we are in), a raw gammon, and keys to a bentley (later confirmed as a continental gt). she obviously wasn't skint, so why steal. especially a gers shirt, why not steal something good