Chadzat, you nailed it in one!
Cadets, Jetstar or otherwise will eventually go to command. CASA have assured that. I've only just logged on to this thread and was going to warn about swh, but alas too late. It's been flogged so much in the "REX" thread, it probably deserves to stay there!
My opinion about Career Co-pilots? Well in the not too distant past it wasn't unusual for F/O's to sit in the RHS of a Domestic Jet for a decade or more. The difference then of course is that the F/O was considered a valuable part of the crew. They had finally made it to what many considered to be the Holy Grail, and were remunerated accordingly. While waiting their turn in the RHS, they were able to buy a home, raise a family, take quality vacations and even plan for their retirement. When the opportunity to qualify for command finally came around, the increase in pay usually assured a quality of life in retirement worthy of a lifetime of professional work and dedication.
The trouble with today's new age F/O's is their standing in some companies has been reduced to that of "Apprentice", with a comensurate reduction in income! Methinks some serious social and emotional issues might be afoot in the years to come.
Just what you want in an Airline pilot!