Businessmen love to talk about the importance of fair markets, but give them any opportunity to introduce a distortion that will favour their particular business, and they will take it.

There is a market for workers that should favour people earning the salaries they are worth because market pressure will push up the price of the good employees.

This will never do for short sighted enployers, so they introduce the distortion of secrecy about salaries, and even try to make it appear to be in the interest of workers.

Secrecy is only in the interest of employees who are being paid more than they are worth, and of employers who do not want to pay what good workers are worth.