Earlier quoted context omitted.
What exactly is the point of having a law if you don't expect it to be upheld? If these managers illegally retaliated for sharing salary information, then nail them to the fucking wall. Who the hell cares if they're "uncomfortable" that things are changing? Yeah, maybe a tiger attacks people when it feels threatened. You still put it down.
There's a huge issue of laws built around the intention of an action. That is, the action itself is not illegal unless also backed by a given intention. These cases are nearly impossible to prove in court. How do you prove that someone did something with a certain intention? Especially when they have 5th amendment protection? Unless they come out and say it voluntarily, or unless you have solid evidence such as email…
Intent can be inferred from circumstances and other actions alongside the prohibited action; and this is particularly true in civil cases where the standard is a mere preponderance of the evidence rather than proof beyond a reasonable doubt.