They don’t get paid enough to deal with their own management.

Almost certainly not.

Depends. How do retail workers feel about watching people use the self checkout and leave without saying anything?

I interact as little as possible with any sort of retail workers because anxiety. I’d rather do another round of the shop looking for that item than ask an employee and use 5 valuable seconds of their time.

If they feel the need to deal with me, something has gone terribly wrong for both of us.