It is not about everyone getting equal pay. It is about everyone having equal visibility. The former creates unmotivated employees, the latter creates one of two outcomes: 1. Satisfaction of relative comp for the amount of work done -or- 2. Understanding of what is valuable in this venture; how to spend your time
Often times in larger establishments (after playing enough politics to gain visibility), I found myself in camp (2). What you think is important is seldom actually important to the powers that be. If you find yourself disagreeing with the last statement, go hug your management team / coworkers!