Puts a new slant on "buy yourself a job" i guess. Applicants will have to weigh up a six year bond and a sh1t salary versus more certainty over the GA path. Dont know which'd actually cost more.
As for the "subsidy" from Jetstar, I doubt it. I'd be willing to bet my left one that students will not be drawing a salary until completion of line training. i.e. Jetstar will get maybe 150 (or more) productive hours with each F/O for free. This is "pay for your line training" by another name.
The devil is in the detail, and for advertising purposes they will tart up the deal with lots of magic numbers.
This is has a commercial advantage for Jetstar and thats it. Pure and simple.