Australia will be alright.
I'm picturing a bogan cracking open a Victoria Bitter while his mangy mutt pisses on the corpse of the Reaper that keeled over and died on his lawn after being bitten by a spider.
It will not. By the time ME is set Australia will be dead. It's already an ecological disaster right now. Mix in some global warming, disastrous species introduction (in the past) and the fact that Australians still, to this day, prefer ruining their topsoil over just importing food from elsewhere (Australians should stop aggriculturural farming, right now. They should also stop herding sheep, cows and all those things. If they want to do anything farmer-ish, their only options are Kangaroo-farms. Cause you know.. Kangaroo's were made for the Australian environment. Everything else Australians farm is NOT and is ruining the environment), and there's very little hope for Australia.
And no, the fact that stuff is from 'somewhere else' isn't necessarily what's killing Australia. The fact that Australia has always, even before it was settled by Europeans... hell, even before the Aboriginals settled, had the weakest environment of all continents and what the Australians are doing to it is what's killing Australia.
/rant