Move forward to the Gillard coo and broken tax promise.
All of a sudden, the electorate support for such a measure plummeted.
So much so that the Libs have stupidly chosen to exploit it and oppose it.
You mean coup, correct? Or is there a play on words that I'm missing?
I don't think the change in public sentiment was all of a sudden after the election in 2010. There was a turning point at the failure of the Copenhagen talks at the end of 2009. Before the Labor coup there was a challenge in the Coaltion where the two key issues seemed, at least from the exterior view, to be the leadership of Malcolm Turnbull and support for an emissions trading scheme. The vote was against an ETS, and Turnbull, by the narrowest of margins. The Rudd government (very) quietly pushed back the introduction of an emissions trading scheme to 2013 in early 2010, which after the rhetoric of the previous 3 years was disconcerting to most of the electorate, to say the least. Neither party wanted to commit to an ETS for the next government during the 2010 Federal campaign, and it would have remained on the backburner if the Greens did not hold the balance of power in a parliament with no clear majority. So the opinion of the electorate on an ETS was more of a gradual slide, that began with the outspoken deniers in the Coalition before Copenhagen, that led eventually to a change of opposition leader and policy, the loss of political will from the government not long after Copenhagen and then continued with a very effective negative campaign from the opposition since the fallout from the 2010 election. The other factors I would point to are an obvious bias in certain sections of the media, which includes The Australian and Alan Jones; electoral fatigue on the issue in general; and definitely, the backlash from the broken promise from Julia Gillard that has been exploited so effectively by the Coalition.