Its the lifestyle that will attract the F/O's out of Jetstar. They might be getting good money at the moment but they can't see a long term career in an airline where all you do is go to work, come home have dinner then go to bed to go to work again. Its why the LWOP pilots are voting with their feet and going back to be S/Os but only for a short time. Career wise your choices with mainline will be a lot more varied than with Jetstar and over the lifespan of your career the money will also be better. The selection process is not going to be a walk in the park though as one of the QF Cadets found out.