In the '80s there was a government policy that there should be a tower at every aerodrome with jet RPT services. Those services spread faster than the Tower program! The tower at Gove was built but never manned. Dick Smith took control of the CAA and started the cost benefit analysis of towers resulting in the closure of many including Mt Isa, Wagga, Karratha, Port Hedland (until the Shire offered to pay to keep it open), closure of briefing offices, closure of Flight Service etc. This eventually resulted in development of a structured approach to airspace collision risk analysis, involving ALL sectors of industry. An evolved version of that process is now used by the Office of Airspace Regulation, within CASA but with its own establishing legislation and Ministerial direction.