It is true that there are quite a few Captains at the top who are not going anywhere until they can't pass their medical or retire, which is an unknown percentage of approximately 600 pilots, if I remember the numbers correctly. This does mean that the remaining 800 Captains would have to move on relatively quickly (assuming no growth) for most of the FO's to have a shot at moving on. If, however, a PIC type rating was attainable out of initial training, it would help some pilots move on earlier as they could LOG PIC time anytime they were the Sole Manipulator of the flight controls, even though they aren't Acting as PIC. This logged PIC time would open doors up for some mid seniority pilots to move on sooner, which would result in movement for most of the FO's, and could actually result in a lower overall operating cost since the average FO salary would go down with the average FO seniority. Just a thought.