Senator WONG (South Australia—Minister for Finance and Deregulation) (14:03): First, there is another lie contained in Senator Cormann's question, which I will respond to. Opposition senators interjecting— Senator WONG: It is a lie. Senator Brandis: Mr President, I rise on a point of order. Senator Wong effectively called Senator Cormann a liar. That is unparliamentary. She should be ashamed of herself and she should be required to withdraw at once. The PRESIDENT: There is no point of order. That is not what was said. Senator WONG: I suspect that Senator Cormann may be a little more robust than Senator Brandis at the moment, for whatever reason that might be. He seemed quite fine. Honourable senators interjecting— The PRESIDENT: Order! Senator Wong, resume your seat. Order! On both sides. Senator WONG: One of the propositions put to me in the supplementary was that well-known phrase 'world's biggest carbon tax'. We know that is inaccurate. We know that a number of countries— Senator Cormann: Mr President, a point of order in relation to the requirement for the minister to be directly relevant to the question. She has now used more than half the time allotted to her and she has not gone anywhere near the question, which was: at what point in time will the government assess whether its carbon tax has been a success or failure? That is a very serious question and I urge you to direct the minister to be directly relevant to the question, as she is required to be. The PRESIDENT: I consider the minister to be answering the question. The minister has 27 seconds remaining. Senator WONG: Thank you, Mr President; I am responding to a proposition in the question. In response to that, I would make the point that Britain is expected to have a carbon price of $24 to $30 a tonne, this is over the next few years; Sweden, $130 a tonne; Switzerland, $30 to $60; Norway, $53; and Ireland $24 to $37 a tonne. Of course, the scheme that is most expensive is the one that is proposed by those opposite.