This isnt a 'lets insult Jetstar staff' argument. Please dont take it as such.
In a profitability sense yes FLGILC that is absolutely the case.
The basic issue I think is this. The goal of any LCC is to work out how to charge more than the next guy to survive. Qantas had/s a brand they could harge te earth for.
In sensible hands the 787 would have been a gold mine. Jetstar in a business sense will waste the opportunity to provide better product than the next guy. Qantas could have easily charged a $500 (say) premium for a 787 seat. Jetstar models require them to sell for $500 less on a product that CAN only differentiate itself in the marketplace on price - ergo: 99% of pax wont give a toss if they are on a 737-100 or a 787-800.
I dont think anyone has anything against Jetstar staff - far from it. This discussion is about managerial insanity on a very base level.
The Emperor has no clothes.