That statement is nicely worded to engender division of the workforce. It implies that NERL can afford a larger payrise, but that NSL performance is effectively capping everyones award . A nice attempt at creating resentment and division.
And if an agreement comes down to depending on the the stated 'agreement on provision of met' it is a nice way to engender division between the ATSAs that do the met and everyone else - well done management