Like it or not, a unionised legacy workforce is expensive. (Sickies, staff travel, allowances, penalty rates...dry cleaning!) There is a never ending crowd of keen young people willing to do their job for half the $. Their enthusiasm usually burns out after 6-12months, ready for the next batch.
Never ceases to amaze me the amount of workers who subscribe to this notion, whilst it is not their job that is affected.
Well, sooner or later, they will come for everyone.