[Dylanlacey]

I think concealment is a big problem in most industries, and one of the main reasons companies try the "not allowed to discuss your salary" trick. The other one is so that people who aren't as well paid as others but think (or are) better at the same (or harder) jobs don't get fed up and either demand more or leave.

So... Ultimately talking about your salary hurts no-one honest and open. Because trying to prevent staff from being unhappy at being unfairly compensated OR having to pay a fair wage isn't either of those things.