If you're any good at your job, you should avoid these open companies like the plague. Don't piss away your leverage..
This got downvoted, and the tone is a bit harsh.. but it does speak a bit of truth. What happens to the guy in open salary co who is legit 50% better than everyone else? Do his peers vote to give him 50% more money? Or does it settle on sort of a union style pay scale, where everyone with the same # of years of work makes the same money (which is great for the worst performances, and terrible for the best performers)
On the other hand if its an arbitary, political or a self appointed measure I can imagine collegues could have a problem.
Sales is one area where measures are somewhat possible. For instance if a salesperson is consistently doing 2 million while collegues do 1 he or she is better in that quarter and is automatically compensated better because of commissions. Collegues far from having have a problem celebrate the achievements and aspire themselves. Similarly if someone closes a deal in half the time of the typical deal cycle then they could be considered to be better. They will close more revenue and get more commissions.
But it is important to point out its not the people but the performance being measured that is better and if you can do this as clinically in other fields compensation can be designed to automatically reward performance.