Not wanting to get into or start one more QF vs JQ fight I'll stick to the facts.
Jetstar was born with more than one purpose but only one publicised intention.
That was to maintain market share on domestic flights with the entry of Virgin Blue.
We can argue all day and night but that part of the parents intention has been achieved.It's methodology is another argument but it has done the job in that regard.
The problem is that not withstanding the success of the Jetstar formula it's viability domestically does not necessarily translate to international long haul flights.
The geographical location of Australia does not lend itself to the same probability of success that low cost carriers in other parts of the world enjoy.
If QF was given the right aircraft for the job,advertising etc and the correct management approach to staff then it has and always will have the potential to be very profitable.
To do that though the staff need the tools for the job and that includes good management practice.