Why do people steal?

So the other day i did a stupid thing and i was in a hurry because it was a longer than intended pitstop to Wendy’s we ate inside. And we had to be in the parking lot for work in 20 minutes but we lost track and had to hurry out. I left my wallet. So i froze my cards and everything just in case. So i call up there the next day (because i called the day of 12 times, no answer) but when i went up there to get it they had it but the only thing they took was my cash. The one time i actually have cash. It gets stolen. Could have stole my credit cards, my atm cards, my Facebook passwords, literally my whole life. But you did the right thing by turning “my life” in but you just had to take the cash first? $32... Doing half a good thing is still bad. Believe it or not. Ugh. Dirtbags.