The Labor party just barely held onto power in the last election on a promise by Gillard of no carbon tax. Of course if you trust a liar as your leader you can't cry when it turns out she was lying to you all along.
Eventually, people tend to get the kind of government they deserve, but in this instance they almost certainly had it arbitrarily imposed on them from the outside, offshore, through clever subterfuge beginning with the deposing of Rudd. At some point any pretense of democracy under these conditions becomes a sham. We live under the iron jackboots of marxists masquerading as environmentalists, according to the original plans of Antonio Gramsci.