recce,
I apologize if the term "micro" offended you, maybe "limited" would be a better term. In reality you would probably at most in naval terms be able to send 1 frigate, that is what I meant by "micro", I was not questioning the actually performance or ability of your forces, just that sending 1 frigate would not be a significant addition compared to what an ACF would offer us.
TO even things up a "wee" bit, I would say that historically the US at times may have felt that Australia's contribution to ANZUS was "tokenish". In some ways our paths (in terms of defence spending) have diverged in the last few years. I think NZ was historically about 1/5 of Australia in terms of population and GDP, the gap in both of these has begun to open up in the last 15-20 years. At the same time our % on defence spending and US alliance access has diverged, probably increasing the gap in force ability.
As for actual threats, (from recent reading) I think Australia could defend its territorial airspace well enough on its own. Defence spending IMHO is as much as about projecting the strength to ensure you don't have to fight, then actually engaging in hostilities. Having a regional ally with ACF committed to assiting us, just increased that perception and its demise reduced it.
Having read the thread through before I posted, I saw a number of references to your benign environment (from a kiwi perspectives it probably is.) and defence thinking being done solely in terms of that. I didn't see references to what your alliance with us (which AFAIK is still active) meant in terms of what you were planning. So I have been just trying to understand what as an "ally" your offering us. Maybe I have a peculiar view that if your committed to an alliance, then both sides bring something to table. I'm not saying NZ doesn't, I'm just asking what do kiwi's see you bringing to the table, that Australia would truly value.
As an Australian (and I'll admit being reasonable uninformed in defence matters) what I would like NZ to most bring to the table was ACF, that could be deployed to assist to defending the air andwaters over which any enemy would have to approach us both. That is looking like something that is of the past. Australia interfaces with Pacific, SEA and Indian Ocean, NZ's interface is largely Pacific.
Ensuring peace and order in Pacific has problably been under emphasized by Australians, New Zealand has something to offer us there. Maybe I as an Australian am still living out the last great conflict, where a remote power swept through the region above us and our traditional security ensurer was enable (due to circumstances beyond there control) to do anything about it.
Or maybe the split in Aussie v Kiwi psyche occurred even earlier, federation was driven in part by defence fears, maybe Kiwi's have just never felt as threatened as the colonies that formed Australia.