not on the basis of current employer
Well isn't your current employer part of your experience?
At the end of the day they will take who they want and it is not "illegal" discrimination as defined in the Act.
Unfortunately in our enlightened western liberal democracy an employer has their hands tied. Eg. You own a small business and want a receptionist, you know you want a young lady but thanks to our current legislation you cannot state that in the advert. So lots of people apply including young men (or old ex pilots) who have simply wasted their time because you were never going to employ them anyway. Now we could debate whether this is "wrong" ad nauseum but it would not change anything.
When Kendell, Hazelton and Skywest became part of the Ansett group I believe there was tacit agreement of no poaching. Is that ilegal? No. Even if it was could you prove it? No.
Q will take who they want when they want from where they want. Of course they will not want to create two training slots by taking from "in house" but they still do so occasionally.