Transparency would also level the playing field in terms of negotiations. Whether or not you are a good negotiator should not affect how much you get paid for most types of positions. As it stands, in most companies, negotiation is welcome and if you're savvy, you can get all sorts of perks that someone who is not savvy will be unable to get.

I'm a big fan of salary transparency -- the last startup I was a part of practiced this and I found it great for a number of reasons, primarily because anyone can say, "Hey, I'm performing at or above this person's level, I should be compensated accordingly."

Unfortunately, talking about compensation is still a pretty big taboo so I don't see this becoming mainstream anytime soon.