I'm not a lawyer but does at will mean anything in cases where you are dismissed for an illegal reason? Basically your company can fire you at any time but if they fire you because your black it doesn't matter if in theory they could have fired you because you wore red on Tuesday if in fact they actually fired for being black.
If its protected to talk about your salary or wages and they fired her for doing so its illegal.
If its protected to talk about your salary or wages and they fired her for doing so its illegal.