I don't think this has anything to do with unions. Georgia has a similar website (and Georgia is mostly anti-union). I think it has more to do with being a check-and-balance when dealing with people who are being paid with public money. You often hear about those scandals where public employees gave themselves and their friends huge salaries and bonuses; I think these websites are there to expose those types of fraud. It's no different than top executives at public (public as in stock listed, rather than gov't owned) having to disclose their compensation packages. People in a position of power have a tendency to abuse that power. There needs to be transparency in these cases.