Border protection/defence sort of defeats the purpose imo. Like this isn't Age of Empires. And we aren't in 1788 anymore, Toto. Whole armies from other countries are not just going to descend on Australia and claim it for themselves. Even in the highly, highly unlikely situation that this happens, how the fuck are they going to claim the whole country before we get international assistance? We aren't exactly inconspicuous. It's taking us eight years to wire our country ffs. The billions spent on defence is better spent on something like tax cuts. Or health. Or education. Hell, even a stimulus package or ten.