Eons ago, 25 or more extremely experienced Australian Approach and Tower Controllers went to work in Hong Kong for the opening of the new airport.
Most had asked for 3 years leave without pay and were denied.
MisManagement thought we wouldn't go, and got a very rude shock when we did.
No thank you for 20 years of dedicated service.
Where I worked we were told " If you go, you WILL NEVER AGAIN work in Australian ATC.