The regulator will not touch IR issues.
Well that's a bit of a myth. What do they call FRMS? What about work rules? They're regulated by CASA and are part of a EA. So CASA are right in the thick of it whether they like to believe that or not.
If I recall correctly REX lobbied the Government over the first iteration of the FRMS which according to them would have caused problems for their operation. So CASA kindly went all out to accommodated them and ignored their own research. So if CASA think they are not involved in IR matters they are delusional.