If you can't get through a regional interview in this day and age then you really are not prepared enough or your flying skills are not up to scratch. It ain't that difficult.
Even if Rex give you the boot there still is Skippers, Network, Jetcraft, all the QF regionals, O'Connors, Pelair......the list goes on.
If Tiger want to hurt Jetstar all they have to do is up the ante on the pay and they would be flooded with ready to go type endorsed pilots. I somehow feel that Tiger is not going to help anyone flying around GA in the bush. They will be looking for typed pilots, and failing that heavy turboprop drivers, not GA bugsmasher guys.