Mr SWAN (Lilley—Deputy Prime Minister and Treasurer) (14:13): I appreciate the question from the shadow Treasurer. He was the parliamentarian who tweeted asking Australians what he should do about climate change, particularly when he has had a lifelong support for a price on carbon. So enough of the hypocrisy from the shadow Treasurer—enough of that. We on this side of the House have always believed in putting a price on carbon and, until the leadership of the Liberal Party changed, so did they. The member for Wentworth, when he was Leader of the Opposition, believed in putting a price on carbon. And there is a very good reason for that: so we could encourage investment in renewable energy, because no prosperous, first-world country in the 21st century can remain so unless they price carbon. That was a bipartisan consensus in this parliament. Mr Hockey: Madam Deputy Speaker, on a point of order. The question was: will the Treasurer apologise for lying to the Australian people? The DEPUTY SPEAKER ( Ms AE Burke ): It is an abuse of a point of order. If he is asking about relevance, he does not need to introduce argument. The Treasurer has the call. Mr SWAN: This side of the House will always do the right thing by the Australian people and our nation. And we will do it in the face of the most negative opposition in Australia's history. They are not interested in our national interest and do not care about a prosperous economy in the 21st century. We will always fight to put in place the long-term reforms to make our economy resilient. Mr Simpkins interjecting— The DEPUTY SPEAKER (14:16): The member for Cowan will leave the chamber under 94(a). The member for Cowan then left the chamber. The DEPUTY SPEAKER: The member for North Sydney on a supplementary.