If you are going to put in a new runway, Freeway extension and Rail line why not then just build a new airport at Sydney where the demand actually exists?
Civilian Access to RAAF Airfields
Summary – Major Capital City and Secondary Airports
50. There is no case for RPT operations from Air Force airfields where an adjacent Major Capital city Airport is available as these aerodromes have adequate capacity well into the future. The caveat, with respect to the Sydney Region Capacity Study being the exception. In seeking to operate a civil airport at AMB, EDN, PEA, or RIC, a prospective operator would be basing their proposal on commercial rather than operational considerations. Additionally, the WLM experience provides sufficient warning that civil aviation access can have unintended consequences for Air Force, including increased costs, capability loss or skewing of personnel requirements, (both ATS and ARFFS), and ultimately reduced military access to the airfield, with attendant significant, and possibly irretrievable capability loss.
51. If significant general aviation activity was to be approved at Air Force airfields, reversing the decision would be difficult. Further, it would be difficult to be selective when agreeing to a request from a commercial organisation to use an Air Force airfield as it would no doubt be followed quickly by others requests seeking similar access.
Any initiative aimed at introducing Heavy category RPT aircraft will require increased wake turbulence separation distances, thereby reducing arrival and departure traffic rates, which will serve to disrupt both military and civil movements. WLM terminal airspace is designed for fighter operations, and is not adequate for either increased levels of Medium category aircraft activity or the introduction of Heavy category RPT activity. Major exercise activity also creates significant increased traffic flows adding to congestion. The impact of heavy aircraft activity on required ARFFS category may place further unfunded pressure of Defence resources. A review of the current Operating Agreement, to allow access by Heavy category civil aircraft to WLM, is inadvisable and the WLM/NAL lease should be amended to exclude Heavy category civil operations. A summary of WLM traffic capacity issues is at annex B