Earlier quoted context omitted.
That only would make sense if they don’t have cameras in the stock room and loading docks, etc.
I've worked at more than one location where the Cameras in customer areas were conspicuous but the cameras in the employee area were hidden.
The threat model in the two areas is a bit different, so different tactics are used. It doesn't mean that some people are trusted more than others, just that as groups they behave differently.