This is all part of the CAsA policy of "SAFE SKIES ARE EMPTY SKIES".
Why would anyone thing CAsA gives two hoots whether outback Australia has an air service or not. They are only required to consider safety.
One wonders why they only require 30 meters though. Obviously the wider the runway the safer it is, perhaps they should require runways to be as wide as they are long, just to be on the safe side!