This is true, I cannot be required to fly a junior man assignment, unless I pick up the phone and they are specifically calling me to fly. I can't be JA on a call I make to scheduling, coming off the jet bridge, walking into the crew room, etc. I don't know about our big IROP, I was never called, I don't have experience in getting JA during that event. My experience so far with JAs have been minimal, I was "offered" one, I refused, they went on to the next guy.
Don't mistake my assertion about money as indication I'd like to settle for just a small raise in our next contract. I'm just saying I'm not going to chase hourly rates (even a higher W-2) of a legacy carrier and give up the QOL l enjoy at my ULCC.