Senator IAN MACDONALD (Queensland) (14:41): My question is to the Minister representing the Prime Minister. Minister, we are constantly told by the— Honourable senators interjecting— The PRESIDENT: Order! Just wait a minute, Senator Macdonald. Both sides, Senator Macdonald is on his feet. He deserves to be heard in silence. Honourable senators interjecting— The PRESIDENT: Senator Macdonald, you will be heard in silence. Order on my right! Senator IAN MACDONALD: My question is to the Minister representing the Prime Minister. We are constantly told by the Prime Minister that the carbon tax is good for Australia and, indeed, good for the world. Why then did the Prime Minister three years ago solemnly promise never to introduce a carbon tax under any government she led? Did she three years ago not understand what she now— Honourable senators interjecting— The PRESIDENT: Order! Wait a minute, Senator Macdonald. Honourable senators interjecting— Senator IAN MACDONALD: I can understand why they are trying to drown me out. The PRESIDENT: Order! Senator IAN MACDONALD: Did she not three years ago understand what she now claims are the great benefits of the carbon tax? If that is not the explanation, why then did she break in spectacular fashion the promise never to introduce a carbon tax? Why would the Australian public and Australian families now ever believe anything the Prime Minister might say at the next election or any other time?