Are you saying you are not aware that the US does not OPERATE it's Class E differently to other places, and particularly, ICAO?
What differences, exactly, are there between the application of Class E procedures in the United States, Europe, and Australia
Have a look at the thread on the ATC forum about Class E procedures, and you will see a panorama of different applications. US controllers claim to "morally separate" as well as pass traffic, and their parameters for operating their E like C differ to how the Brits do it (1000' or 3000' for example). But all this is an aside to the oz issue; ATC is different in the US to oz. Why? Because oz controllers are wearing 3 hats while they do ATC; flight data, FS and ATC. Where in the states is en-route control done that way? All these dry arguments about comparing the US to oz don't refelct coalface reality- a common problem in ATC. I could go on for ages about this subject, but I'll just leave you with a simple question;
IF CLASS E IS "SAFE", WHY ISN'T ALL THE AIRSPACE IN THE US, OR THE WORLD, CLASS E? Note: See HeretoHelp's post.