Aged care facilities think all their Christmases have come at once, there are so many applicants for anything they advertise, which is so different to a couple of years ago, when it was difficult to fill any RN positions, but thanks to immigration all filled up and now they are beating them off at the front gate.
Most positions now state that a current work visa must already be held by the applicant, so sponsorship is now difficult to obtain and this cuts down on the number of applicants.
Hospitals in most states are in a state of employment freeze, private hospitals are also now advertsing any positions as the applicant now needs to be be a citizen or PR due to cut down on the huge increase of applications.
There is usually part time work, which most overseas nurses that can apply for holiday working visa's can pick up easily or if you have permanet residency visa.
As for comparing, the UK and Australia, someone else will have to fill you in.
Pay is different in every state and whether it is private or public or part time. Also just where you would start in the years of experience.