Ejector,
Very interesting that you see a position in Jetstar as some sort of 'payback' for being a cadet. Im sure that there are plenty that would be absolutely stoked to be employed by J* domestic or international.
And just to clear one thing up, once the cadets currently in the regionals are employed by QF, their positions are filled by the next group of cadets.
One way to look at though, is that while the cadets being placed at the regionals are filling jobs that would otherwise be filled by experienced GA guys, it means that they are not filling the seat of a 400 or a 380. Someone has to, and it might as well be you.
Best of luck