Mary meagher- where to begin? I am quite certain that I will not be the only one to respond to your post.
When referring to the RFDS we are not referring to medical doctors who may (or may not) have any piloting skills, thrashing around on the weekend for their personal edification and jollies; rather we are referring to a highly professional flying organisation.
The RFDS employs professional pilots to transport professional medical staff and patients to and fro medical facilities and the GAFA.
The pilots of these "costly" twins (and singles) are generally considered to be the cream of the crop in the aviation world. They have to be to do what they do (no flaming bog-roll, dark-hole approaches for me!).
In short most of us, who know, either aspire to be or are a little jealous of the boys and girls in those "costly" twins.