Perhaps it's coming from a perspective of others who feel that they are being abused as well, treated unfairly and hate their job and would very much like to ge

Perhaps it's coming from a perspective of others who feel that they are being abused as well, treated unfairly and hate their job and would very much like to get paid to do nothing, so if then someone "less deserving" (at least from their perspective) would get the thing that they themselves want but can't have, then that leads to strong feelings of resentment and unfair treatment. "If I can't have it, others shouldn't as well" is not constructive, but a quite widespread, unsurprising perspective.