I am sorry, but I do not believe it is relevant to ask how educated they are. Using sanitation workers as an example, I would put it this way.

If you do not have enough sanitation workers because you cannot fill job openings at the current level of pay, then those government workers are underpaid.

On the other hand, if you do not have enough sanitation workers because your budget is busted by the ones you have, then those government workers are overpaid.

Basic microeconomics.