Supply is globalised now
how exactly Qantas would flood the markets with expatriates
You cannot have it both ways Tuck mach.
Pilot supply from overseas (to many countries) is restricted by local licence issues.
So most pilots will have no issue moving to Dubai, Abu Dhabi or Dohar and converting their licence. The same with Hong Kong.
However try moving to the EU with an ICAO licence and you are looking at FOURTEEN exams and two flight tests.
A US licence is easier to obtain but the right to work there (green card) is not.
Hardly free movement of labour.