As I see it, Mgt seems to be upset because the pilots aren't working extra days the way they used to in the past. They are only showing up for their scheduled events.
perhaps because it just isn't that much fun to work there as it used to be.
And yes, the airline needs the ramp guys.....etc. to fly, just as it does the pilots. But, I don't see many lawsuits being filed over the ramp guys not volunteering to work on their days off