How come we have never trialled at least one non tower airport in Australia with class E to 700 agl? It's all about zero leadership and resisting change.
How about you show us the cost-benefit first. I see elsewhere that Australian ATC's already control twice as much traffic as your beloved Yanks. Who's going to provide the approach services?
The US does not have one Unicom operated by paid ATCs.
Nor does Australia, nor will it...