I think one long term effect of this would be driving up wages outside of states that require posted salaries, at least for some positions in some industries. There probably aren't enough businesses signing on to this idea to make much of a dent though. As a business, you're effectively reducing your own labor pool. Either way it feels like the corporate equivalent of cutting off your nose to spite your face.

Probably the same idiots whining that "no one wants to work anymore" (cue worlds tiniest violin).