Dick,
It usually takes some time to understand the real motivations of your posts and the underlying reasons.
1. Federal election looming
2. ASA / AERU functions moving to CASA mid 2007.
3. NAS still Government policy and there is no better time to remind the policy makers of their policy than now (refer to point 1)
4. One major hurdle for NAS and especially for attempting Class E over D again, the lowering of Class E to FL145 and Class E corridors is unalerted see and avoid, and the associated risks that have no effective mitigation.
5. TCAS cannot be used as mitigation.
6. Your proposal for increased fitment of transponder and TCAS, would enable strong lobbying with policy makers (see point 1) to make new policies prior to point 2 occurring regarding the use of TCAS as risk mitigation. This lobbying can be especially effective when the newly formed CASA wing has little knowledge of past history.
7. TCAS becomes the saviour of the many risks associated with unalerted see and avoid.
8. All remaining NAS characteristics are implemented by the newly formed CASA following Government policy and mandate. Resistance from industry over safety concerns and cost benefit is futile.
9. TCAS fitment and mitigation decreases the need for fast tracking any ADS-B in low level airspace as the cost argument could be used. The only solution would be for ASA / Government to pay for fitment 100%.