To mangle Paul Keating's famous phrase, never get between business leaders and a bucket of money.

Both business and the Coalition have upped their already extraordinary rhetoric about the Coalition's proposed tax cut for big companies. Today in the Financial Review, the executives responsible for the biggest business lobby groups -- the Business Council of Australia, the Australian Chamber of Commerce and Industry, the Australian Industry Group and the Minerals Council of Australia -- launched a broadside at opposition to the tax cut. With an accompanying piece of cheerleading from Tory columnist Jennifer Hewett, the Four Rentseekers insisted that Treasury's modelling of the benefits was sound, that critics were guilty of basic maths errors, that the UK showed that cutting company taxes stimulated investment, and that opponents needed to come up with an alternative proposal.