But the question is where? I know your views on Singapore but that is what all the Asian colonies are being told by the professionals is the magic silver bullet. If not that, the Philippines.
Should limited Depression Australian Pounds be spent on local defence or supporting the plans of the great ally? That is a big question even today.
Bluntly?
Australia was abused.
One can invoke hindsight. We have a nation about the population size and economic power of New York City at the time, that was asked to step up and do the work of France in the Pacific War.
She was asked to feed a huge navy and air force (not her own) and to supply a field army (her own as well as her allies) that was about 1/4 the size of the forces liberating France. THINK about that one.
Since then, she has been tasked with covering the Southwest Pacific Ocean Area, which is essentially the same mission as WWII.
Now I am anti-colonial imperialist interloper by temperament and I think whoever is local needs to be let alone to solve their own problems their own way, but that has not been allowed to Australia. I am an American and I cannot answer Australia's questions for Australians.
What I can say objectively, is that Australia in WWII had very little choice as a practical matter. She had to have an ally's help to secure her own sovereignty and national right to exist as a free state.
Britain for various reasons failed to do that for Australia in the 1930s. I am not going into the politics, but I have a certain Singapore Bastion Defense bias that has been mentioned. If you want my opinion PM me as it is tangent to this topic.
In the context of ANZAC re-armament, the criteria for 1930s options boils down to three areas.
Infrastructure. The threat axis is from the north. The productivity centers are in the southeast and wrap around to the south. The primary forward positions: Darwin, Port Moresby and RABAUL; are virtual geographic islands isolated from the southern areas by lack of economical transportation access across deserts and oceans and northern SWAMPS. The answer is a railroad from Adelaide to Darwin and shallow draft freighter passenger ferries from Darwin to Moresby and then freighters from there to Rabaul. All three sites should have been aerodromed out the wazoo and Moresby and Rabaul heavily land and air garrisoned and provisioned to stand siege. THAT is Alfred Thayer Mahan, the Australia version.
Economics.
Learn to build cars and locomotives locally. You have a FREAKING MINERAL TREASURE HOUSE in New Caledonia right next to Australia. Need iron, nickel, coke, molybdenum and trace rare earths for steels? Send ships, load ore and smelt baby, smelt. It does not have to be a large steel industry but it has to be a GOOD one.
Politics.
Empire is a manure fest. There, I wrote it. Canberra has to decide whether to answer the London bankers or the Australian voters. I have no say in that matter. From my read of Australian history, it has been a tense tensor between the socialist laity and the upper crust as to how the government functioned in matters of economic policy, internal development and how the tax levy was to be used.
I have my opinions of the era, but...
Now I am anti-colonial imperialist interloper by temperament and I think whoever is local needs to be let alone to solve their own problems their own way
and
I am an American and I cannot answer Australia's questions for Australians.
...not even historically.
But as an American, I can say for Americans, "1776".