Dick, still grappling with what you are trying to get across.
Am I correct in sensing the real issue for you is not so much how G airspace is flown or what frequency you use in G but that you want to increase the amount of E in Oz? (by lowering it into a lot of our current G).
In addition you want VFR in E to not be required to be on the ATC frequency?
Is that a fair summary?
If so am I correct in assuming your reasoning for this is that in the US most actual airspace is E and there, VFR ops in E are not required to be on the ATC frequency? (and that in the US that works safely hence it is not as risky as it would appear on first blush?).
Is that correct?