Where I live, the only "ambulance" we have to get to a major hospital is the RFDS. Although it does not cost, I happily donate a good sum each year to them, knowing the fantastic work they do. I have been flown once by RFDS from Mulan to Broome, had to wait over night with a bone broken in four places (the panadeine didn't do a lot of good), and when the RFDS turned up, and put some morphine in me, I had a great chat with the pixies, and felt no more pain from what I can remember.
People need to acknowledge that when they intend to travel in our wonderful country, although I hope noone needs their services, the RFDS do a great job and more should give a little regularly to keep the planes in the air.
Regards
Tjupurula