The Australian states are quite comparable with salaries in the PHS, except for the ACT - which is much lower.
A starting post grad salary is approximately $AU36.000 - 38,000 pa with a small increase (less than inflation) each year until the cut-off at Senior level. The scope is probably the broadest in skills, so someone from the US,, eg needs to find out much more before venturing on a retraining program....try one of the agencies for overseas folk. Good luck. It is difficult to retrain in Aust.