St. John's Ambulance service in Australia is a hybrid of core paid positions and volunteers (varying by region and demand).
In rural Australia most of the fire, ambulance, and emergency response service are volunteer manned and (locally) run, with federal and state assistance for equipment and costs.
Costwise AU Ambulances are either free (if you're a St. John's member - cheap per annum OR if covered by private / work insurance) or (a decade out of date number) a flat fee of $500.
I don't think this is true everywhere. Queensland has the QAS[1], operated and funded by the state government. There are no (direct) fees.
[1]https://www.ambulance.qld.gov.au/
Thanks for the response, it's been awhile since I used an ambulance. I've got to say, I was willing to believe, what with free Qld buses and all that jazz, but alas like WA it's "qualified":
and https://www.ambulance.qld.gov.au/our-services/emergency-ambu...