Work ethic maybe?
One can have work ethic yet realize they are getting screwed with. I realize that most going to pncl weren't necessarily looking for a leading contract but rather a quick upgrade. But still, when you're paid less than almost all of your peers, under horrible work rules, going to crappier hotels etc, even the best of work ethics can be broken.
I'm sure there is the 20% that hope that if you guys work really hard, you'll get more -900s, more growth and move on. The reality though is the industry is stagnant and you're getting hosed.