It will be quite unfair to expect the US to shoulder a disproportionate burden in collective defence treaties (they already spend 3.7% of GDP on defence, compar

It will be quite unfair to expect the US to shoulder a disproportionate burden in collective defence treaties (they already spend 3.7% of GDP on defence, compared to Australia's 2.1% or Germany's 1.6%). Australia spending on these subs will add to the coalition's strength, with Asia heating up rapidly.