Mr HOCKEY (North Sydney) (14:08): My question is to the Prime Minister. Will the Prime Minister confirm that, based on the government's own figures, household expenditure will go up by $9.90 each week due to the carbon tax, yet the government will only provide $10.10 each week in compensation? Given that the government has not got a single predicted figure right in the last five years, does the Prime Minister seriously believe 20c a week is enough margin of error to cover all the unexpected costs of the world's biggest carbon tax?