Le P, before you source more controllers, there has to be the will to do so. Do you see ANY EVIDENCE whatsoever, that AsA is interested in increasing staff numbers? From the outside, it looks suspiciously like an organisation desperately hoping that technological advances will do away with the need for staff.
Their spin doctors tell the media, right up til today (see article mentioned in this thread) that there is no staff shortage. AsA management tell their bosses (senate estimates etc.) that, alternately, there is no staff shortage and that delays are an industrial campaign/there is a staff shortage but it will be fixed by last August/that there is an 'over-reliance on overtime'!
Now, either their political masters are in on the game and couldn't care less how they spin it, or should be sacking the lying pieces of $hit.
As for Virgin taking legal action- I have been saying for ages that AsA has been cost-shifting onto the airlines for a good while with this under-staffing BS, and now they are finally waking up.