Senator WONG (South Australia—Deputy Leader of the Government in the Senate and Minister for Finance and Deregulation) (14:36): In relation to the latter, I think that has been answered publicly previously: Treasury is not in a position to advise ministers, given the provision of the tax act. As to the details of that revenue, given the confidentiality provisions— Senator Brandis: So you have no idea. It's extraordinary! Senator Cormann: You come up with a new tax and you don't know how much it raises. It's ridiculous! The PRESIDENT: Order! If you wish to debate it, the time is after question time. Senator WONG: However, the government, as I have said now on a number of occasions in this place, is aware of the desire and the appropriateness of proper transparency in relation to taxation matters. That is why we have seen the announcement from the Assistant Treasurer in relation to measures to increase transparency. But again, as I said, we will do this in a methodical and principled way, rather than the ad hoc way that appears to be what is proposed by the opposition.