Why Do People Steal?

Let me rephrase...... Why do people steal even when they know they will be caught?I mean petty theft....dam petty theft!!!! Is it the Economy or the bad economic situation that would make one have itchy fingers or is it hereditary? Thief by default or by mistake? I am not making sense but you will understand inside today's in house news.... For now,let us talk...... No names of via IFTTT