There used to be career progression. There hasn't been for many since 2001. I'm out in a few more years and will gladly give my left seat view to the next guy. That said, FO wages need serious improvement.
I also never understood why Top Step FO pay was worse than 1st year CA pay. When we upgrade, we slide over to the CA pay rate even with our seniority. The only way to have a 1st step CA rate would be to be street hired as one which doesn't happen. This artificially deflates FO pay. Besides, I'm sorry but a 12 year FO should get more than a first year street hired CA on the same equipment.
But what do I know. I just work here