 On 15 April 1942 more price controls were introduced.On 23 July a uniform income tax, giving the Commonwealth a monopoly in this vital field, was attained when the States were defeated in the High Court of Australia.The Australian Dictionary of Biography claims Chifley proved himself to be his country's greatest treasurer – fiscally responsible, able to transmit the necessity for a reasonable equality of sacrifice, and capable of managing a wartime economy of complexity and difficulty.