I was gonna say, this level of theft is possible because of the number of people in the store that care if that store is stolen from.

At a Mom&Pop shop, there’s only one person behind the counter, but they have free time to ask how someone’s doing when they pick up something they intend to steal. Plus, any other customers in the place are relatively loyal, and not of the “stand around” variety. At a big chain store, there’s two employees doing the job of five that can barely even point someone to an aisle, and not a single customer cares if the CEO bleeds out in an alleyway.