"Other People's Expense" ?
Are you meaning by this the evil thrill of inflicting sheer fright upon another? Yes, this can be very addictive (I know SO WELL)
Unfortunately I have found very few people who are driven this way as I was when in the JCs and have been for 25 years here in Ravens Grin Inn.
Sorry. I would Still Pay them.
Maybe it strikes a deep personal feeling of the forgone "Shaft-Itiss" I experienced for many years in a work situation?
"Do unto others....."
Do the right thing by others and sleep will never ellude you at the end of a long day.