Dick,
Exaggerating the situation to make your point just leads to confusion and those who would otherwise support your position stop listening to what you say. While I dont agree with how CASA implemented ABS-B in Australia there are a few key factual errors in what you have posited that I feel the need to point out to you yet again:
You say: "In the USA there is no ADSB mandate ,even in 2020 for IFR aircraft that fly below 10,000ft in E and G airspace, unless the aircraft is within 30 nautical miles of a class B airport."
This is not strictly correct. 14 CFR 91.225 requires ADS-B for flight in class C airspace and in the class E airspace above class C. Class C airspace is fairly extensive in the USA around many minor airports. While it would be possible, operating IFR after 2020 in the USA without ADS-B is not going to be easy.
The other thing that you don't mention is that in the USA, after 2020, ADS-B will be required for VFR flight in these areas. Do you advocate that in Australia as well?