Didn't anybody tell you, NAS is Government airspace policy, and now we have a CASA Director of Aviation Safety who has very publicly expressed his support for NAS.
Bollocks, future NAS reforms are to be subject to cost-benefit analysis and the CRMF. Given the glacial progress to date I can't see any NAS characterisitcs lasting until the next edition of the Airspace Policy Statement that will remove NAS. No doubt that will have the support of the CASA CEO too!
As an aside I note the latest OAR review of Hamilton Island categorically rejected the use of Class E airspace to the circuit area without proper surveillance! That could make NAS expensive.