The use of these labour hire groups is certainly a depressing trend.
Everywhere is using them now, I think every heavy maintenance facility in country uses contractors thru one of the agencies
QF Bris heavy
QLink Tamworth
Virgin have some
Hawkers
Cobham
Jetstar in Newcastle
Aviex
Certainly from the view of getting a permanent job it isn't good - especially if you have a family and would like to see them more than occasionally.