NAS........... It does work. The only major difference between the U.S. and us (apart from the volume) is that they have the appropriate numbers of controllers to provide proper coverage.
You hear this debacle about a "near MIS" down near melbourne the other day. They were in Class C (or A.. whatever they use down there). It was the controllers stuff up!
Its not a case of "using everything the yanks use" but there have been several costly and expensive "australian Self efforts" in the past that have cost the country billions. One good example is the Collins class Submarine Debacle.
All this system is essentially doing is mimicing that used in the U.S. which is very similar to that used un Europe. Maybe we are the backwards ones for not using their system in the first place. Isolating ourselves from the rest of the world, making us tand individually rather then a global effort.