Defending Australia

I live in Canada, as readers know, and I see things from a perspective that is Canada-centric, though I try to avoid it. I seldom consider what is happening to Australia. There is an interesting article at https://www.aspistrategist.org.au/australia-must-double-defence-spending-to-address-worsening-strategic-outlook/?utm_medium=email&utm_campaign=Weekly%20The%20Strategist&utm_content=Weekly%20The%20Strategist+CID_a0a76a6340fb5960060c974b4fae6ee9&utm_source=CampaignMonitor&utm_term=Australia%20must%20double%20defence%20spending%20to%20address%20worsening%20strategic%20outlook explaining a perceived need for Australia to double its defense spending. Thus far Australia has relied heavily on its pact with the USA for assistance, but Australians have a memory of Britain failing to defend Singapore in 1942. A shock to the nation. Perhaps almost a racial memory. Australia has a big coastline to defend, and a concern for the ability of growing economies to the north developing the means to attack.