Flying with a lady DHC Beaver pilot in Alaska a few days ago and she advised that a ADS-B unit was provided free to her aircraft for testing a few years ago. She asked when was Australia upgrading for GA and when I told her that our Regulator required this to occur in 2017 she was aghast and asked why, as the FAA isn't requiring her and the US industry to do so untll 2021, at which time the costs will have reduced significantly, which would also help us if CASA weren't so pig-headed. Says it all really, our CASA id putting needless costs on a struggling industry and it just beggars belief that they have no business acumen or understanding of the industry, but then our skies are just so much busier than North America aren't they!!