Going Boeing,
There is no chance of RADAR being installed in the Goldfields and Pilbara with ADS-B being considered... and yes, ADS-B is the answer to a substantial amount of the problem, provided that the original Low-Level Project for ADS-B installations is achieved (the maximum number of ADS-B installations that would ensure that we achieved complete surveillance coverage of WA down to very low levels).
This would ensure that ATC will see all of the aircraft in the inbound sequence as soon as they are established in the cruise with stable ground speeds that can be used to calculate accurate un-touched landing times at PH/PEA/JT, then sequenced landing times and finally, consistent speed control/waypoint crossing time requirements, and maybe even slot times for departure from the mines to avoid holding!
It'll save lives and save a hell of a lot of money for the industry... it's a win-win for everybody... except, for some reason, Dick Smith.