<human>: Provide a brief overview of the text.

I should be up for a promotion in the coming few months. I easily have the skills to be promoted right now, but my company seems to do anything in its power to stop lower level employees from advancing. For example, I easily have the skills of the next position above me, and about half of the skills 2 positions above me. But I need to have 2 years experience for the next position, so "I can't be promoted."

Over the past 12 months, we have had almost every person at my level and one above quit, leaving a void. We have hired a bunch (10 or so) of employees one level below me. Furthermore, I have skills and interests that only 2 or 3 other people have (in an office of 50). We are also about 10 employees short of making all of our obligations for completing work. 

One of my coworkers just received a promotion, and a shitty pay increase, I'm guessing about 5%. I assume that I'll get something similar, and I view that as unacceptable. I am looking for a 10% increase. Would it be rude of me to to negotiate a pay increase with the person congratulating me on getting promoted? I would make the argument that my skillset, interests and experience fill a void which has grown larger over the past year or so, and that I easily have half the skills of the position above me. 

It's not that I don't like my job or anything. My team is great, my manager is great, but there is this barrier between lower/mid level employees like myself with regards to salary, advancement criteria, and bonuses that seems to be impenetrable and I do not like this one bit.
<bot>: hopefully getting promoted soon. Should I use the fact that many experienced employees quit, only to be replaced by inexperienced employees to my advantage when negotiating a salary increase?