Since there is a consistant standard across the group, these guys & girls would have done the same or similar testing as a Qantas Cadet to get onto the J* course.
They would now all hold a Commercial Licence, Multi Engine Command Instrument Rating & ATPL theory subjects & the A320 endorsement.
These qualifications are the same as those attained from the Qantas Cadet Commercial Program. (except for the jet endorsement)
So, put them in Mainline as Second Officers perhaps the A330 & for screwing them around J* can pay for their A330 endorsement & wages until such time as no pilot surplus exists in mainline.
Or like GG said a class action to recover their costs.
Joyce created the problem, he should fix it or pay them back.