As it is, we already fly weekends, bank holidays, birthdays, anniversaries etc, throughout the year for no extra benefit.
Well there was extra benefit a long time ago, 2 extra weeks leave per year to offset public holidays and shift work. So it's not 'no extra', its just added long ago, similar to the shift workers monthly RDO. Pilots Remuneration is nothing special as it already just incorporates all the extras that inconvenience our lives. So taking that argument to industrial relations wont cut it and fair work would knock it back. What you have to demonstrate really for a pay rise is what has changed in the job, and extras that pilots suffer in the modern world that were never factored. That's if you want to claim extra income is 'required' otherwise the best way to get an increase in todays world is just make the company understand they are competing for YOU. Unfortunately the company will go to the media if you start saying 'poor me' on $100k+, no one will bat an eyelid, regardless of how hard your life is. Jane Doe working at woolies for $500 bucks a week is not going to be impressed that pilots ruined their Bali escape to send their kids to private school... It's way easier to just make sure the company has no pilots if they don't remunerate properly.
Wages are not going ballistic in the US because pilots are crying poor, they just wont work for you if you offer any less...