[GoNative]

For the UK maybe you have a point but Australia is quite different in that it is a realtively new country and has only come into being through waves of immigration over the years. It too would have a declining population if not for immigration. There was certainly a period in Australia where it was very xenophobic (mostly due to the British population here) but after WWII that changed considerably and certainly after the Vietnam War it ended, at least officially, entirely. I don't even know if you could really define what it is to be Australian it is so multicultural these days.