Pinky,
In terms of cost effectiveness, you do realise, do you, that there has never been an accident on an Australian airfield, in the history of Australian aviation, where the presence or absence of an on-airport fire service has made any difference to the outcome.
A classical example of economic waste, when the real risk, as opposed to perceptions of risk, (or mindless following of ICAO, where it is NOT required we follow) are used in decision making.
Tootle pip!!