Isn't AsA self-funded? If anything, those "pesky private citizens in their aircraft" are flying around in a system predominantly paid for by the passengers sitting in airliners (so it's irrelevent if Qantas does or does not pay corporate tax, as long as it pays it's nav charges. As much as people jump up and down about a Fire Service at Ballina, the ARFFS is paid for from Airline landing charges, so if you wander in in your bugsmasher, I imagine you are getting the Firies for free).
AsA is monopoly. Therefore, you'd have to be diverted to playing with three dicks before you could manage not to be able to make money out of it.
Those pesky private citizens pay Nav charges and landing charges too. Those pesky private citizens pay Nav charges and landing charges
and personal tax. Unlike Qantas.
If the passengers paying for those ARFFS services at Ballina knew what a grotesque misallocation of finite risk mitigation resources that is (with the execs at Airservices naturally skimming their cut as a consequence of having the genius to run a monopoly) things would be different.
But your post, unsurprisingly, reveals the underlying attitude that pervades the Australian culture. Private citizens in their own aircraft should just cop whatever inconveniences are imposed on them, pushed to the back of the line behind the airlines and the military.