What you're talking about would likely cost around 100K per location. Multiplied by 5000 locations, that'll run them a cool half a billion dollars. Minimum.

The real issue is Walmart (and others like them) eliminated local businesses, which replaced decent paying jobs with minimum wage jobs. Then lobbied the government to keep minimum wages down. This had the effect of depressing local economies, creating scenarios where people have to shoplift basic necessities.

So instead of having massive corporations spending insane amounts of money (or calling the police) which serves to make grocery shopping a dystopian nightmare for everyone, maybe we should consider the root cause of the problem? It seems insane the amount of resources being devoted towards maintaining economic problems.