Fire wall and suddentwang if there has been a campaign by QF pilots, then it must have been a very quiet one, I do not know of anybody carrying out one.
Yes there is dissatisfaction on the amount of tax we pay and yes there has been a small amount of discussion (not often) in the odd bar on how fortunate the CX pilots tax situation is/was, but there was no campaign by a group of QF pilots.
I doubt that the ATO would have changed the rules for a couple of sour grape reports from one or two misguided individuals.