Money on the old contracts is OK - not great for the work rate, but not a cause of unrest. It is the culture that is the problem, exacerbated by exhaustion, even on the 5/4 pattern. Any company which makes such a big deal about their rosters being "NASA approved" and how they are fatigue proof is clearly aware of a problem and is shoving blame onto the pilots, just like the pilots are blamed for every other issue (medical emergency and return to dep arpt, crew blamed for overnighting because the ground crew went off shift - ACARS would have allowed co-ordination with OPS, but no, publicly blame the pilots for making a decision without being able to ascertain all the commercial information and write a threatening memo in the intranet about it). People are getting sick of the utter lack of investment in basic systems by the company and carrying the can when it so frequently goes wrong, and are sick of bullying and belligerent management.