As an island, Australia has certain obvious advantages when it comes to keeping out illegal immigrants, namely a deep and wide salt water "moat" between Oz and its nearest neighbors. That said, they have a long history of being picky about who they will allow to immigrate there.
See a Global Post article about current Australian efforts to keep "boat people" out. GP of course is horrified at the firm measures taken. COTTonLINE on the other hand, wishes our government was as forceful and unwelcoming.