Because the ADF is not a business, and therefore is not concerned with turning a profit. Their primary concern is producing the required number of pilots of the required standard.
It is a business. The ADF is run by government, for the purposes of government, and it is becoming more businesslike everyday. The costs of 'Defence' are soaring while the pursestrings are being tightened. The ADF will increasingly have to prove that every cent is spent wisely and there must be reasonable return on investment. If this doesn't happen whole capabilities will disapear. Certainly training will be outsourced, our FJ cabability will shrink considerably, as will our Army helo fleet (this is well underway).
I know a broken rotor who failed his final flight test at Oakey and is now a GSO. This after about three years and millions of dollars. My former boss (Army) who is now a Sqnldr in the RAAF, described AAvn and ADF pilot selection as a "basket case", due to an inability to provide enough candidates and courses to meet operational requirements.
Driven by financial pressures, the ADF will radically change the way it does business in the next decade.