What if most people support these laws? What happens when a democracy decides to vote away its own freedom? Should it be somehow prevented from doing so?
I guess in the end, democracy or not, you get the government you deserve. Australians voted these guys in, they tolerate their actions, and many Australians will applaud them. If it all goes well, great. If not, I won't have much sympathy for them.
This is not an attitude I like to have, mind you, because I find that wherever I see tyranny in the world, I believe that to some degree - sometimes a lot, sometimes only a little - the victims of that oppression had it coming.