golly, you wouldn't want someone to sort something out that might work for them and their family, would you? bl**dy hell, we're not all sheep.
There is a reason for everything mate. If you think for one second that if management were able to change rosters at will that it wouldn't be exploited ?
Besides, you work for an airline, you made the sacrifice years ago that you wouldn't get nights/weekends/public holidays/easter/xmas off. It's bad enough that we will never have a normal work/life balance, to have no provision for majority rule in the **** hours we have to work then you're dreaming if you think management would hesitate to make your life worse.
Think back to Perth a few years ago.