Well JQ aren't competing. Can you really say that it's competing on the same route as a MEL-SIN direct service? MEL-DRW-SIN, on an A320 with the need to get off and clear immigration - Really?
C'mon, Qantas are going to keep on creaming the higher yield passengers and there are going to be some punters who are going to take the inconvenient option. This is all about competing with Tiger which JQ do better than QF.