My impression is that, like Canada, Australia is simply not a very serious country, but rather an abortive appendage of Milner's Kindergarten's commonwealth scheme. Occasionally, it lends itself to one idiotic adventure on behalf of its patrons or another, from Gallipoli to Afghanistan, all the while importing angry Muslims (the first act of Muslim terrorism on Australian soil happened 110 years ago, if I recall correctly.) Expecting it to start acting like a real country at this point is silly.