That's why it is hard to find workers in animal care. They are just looking for a paycheck, want to do as little as possible and know the dogs won't rat them out.
If you want real scum, try a shelter. They have to be post office rejects.
I believe you made a typo. Didn't you mean nursing home workers?
Them too! Whenever you have lazy workers with those who are vulnerable, you will have lazy bored people who are uninterested in what they are doing, resent being there and regard themselves as being put upon for doing their jobs.