Mr HOCKEY (North Sydney) (14:21): My question is to the Treasurer. Honourable members interjecting— Mr HOCKEY: There's a decent Treasurer up there! I refer the Treasurer to modelling by the New South Wales Treasury and Macquarie Generation— Honourable members interjecting— The SPEAKER: Order! The member will pause. There is too much noise. The clock will start again and he will recommence asking his question. Mr HOCKEY: My question is to the Treasurer. I refer the Treasurer to modelling by the New South Wales Treasury and Macquarie Generation that, based on current information, revenue from the sale of permits under the carbon tax could fall short by up to $5 billion a year between 2015 and 2020. How will the government fund this $25 billion carbon tax black hole—a real black hole—in its budget?