The Belleville paper has published a data base which allows you to choose one city or school district in the metro east to see how much public employees are paid. Problem is the clickable data box is very slow and awkward and the online story must be getting so many hits that the data is slow to load.
But if you're patient, it will eventually give you a list of salaries of all employees. Here is Collinsville's list
Frankly IMO the salaries are pretty average or below average, certainly few are getting rich.