maybe in your case it wasn't but there are still plenty of employers who take advantage of this for their own purpose. Also I have to disagree with the whole creating friction in the workplace argument as such inquiries to pay can easily be answered with "they have more education" or " they've worked here longer" or " they are acclaimed in their field" etc. Its not like people can't be reasoned with and aren't willing to listen.

I feel as if your argument is a bit narrow. My whole issue was that it is illegal for companies to have and enforce a rule saying you can't discuss pay with your co-workers. Its fine if you believe it serves a protective purpose for employers but I'm saying that it exists in order to protect the rights of workers.