Prime Minister of Australia prime minister, otherwise William McMahon63. Robert Menzies was the oldest person to ever be prime minister, leaving office at 71 years old. The longest-serving Prime Minister was Sir Robert Menzies, who served in office twice: from 26 April 1939 to 28 August 1941, and again from 19 December 1949 to 26 January 1966. In total Robert Menzies spent 18 years, 5 months and 12 days in office. He served under the United Australia Party and the Liberal Party respectively. The shortest-serving Prime Minister was Frank Forde, who was appointed to the position on 6 July 1945 after the death of
Prime Minister of Finland had 72 cabinets. The longest lasting have been the two cabinets of Prime Minister Paavo Lipponen (Lipponen I and Lipponen II), both lasting the entire parliamentary term, or 1,464 days. The prime minister's salary is the same as that of the Speaker of the Parliament, which is €11,675 per month. In addition, the prime minister receives a half of the parliamentary salary. The full parliamentary salary is, as of 1 May 2011, at least €6,335 a month, so the Finnish prime minister receives at least €14,842 per month in total. The salary is subject to income tax. The prime minister