I think aircraft is possibly a little closer to the mark than many would like to admit.
Jetstar is positioned in a VERY price sensitive market at present...which means it doesn't take much of a fare hike to send people back to the inter/intra state trains /coaches....that has in fact happened already in one case and they quickly lowered the fares again.
Anyone who suggests the JPC are industrially naive or not following the views of their pilot body or not seeking input from other very senior and industrially savvy pilots within J* just doesn't know WTF they are talking about...it's that simple.