This wouldn’t surprise me, the J* Perth base is very small and the flying has previously been crewed out of the East Coast bases when J* were doing rescource flying.
J* have a knack of closing small bases, I have a couple of friends that can clarify that!
Offer the guys there are transfer or a Network position if they want to stay...it’s the Qantas HR way with pilots, we are after all just a commodity these days.