The massive savings haven't been seen yet because the 'end game' hasn't come into play.
We see this at NAS Stage 87xxa where DTI is removed. THEN, if someone wants DTI, they pay for the ATCO's required to run a Class E airway to the place they require. Since no-one wants to pay, only at this stage can you start to reduce staff.
Ask yourself why there are continuing NAS project stage meetings!
G'day
