Australia is governed through a federated bicameral parliamentary system. There is separation between the executive, judicial and legislative arms of government. The two-party preferred electoral system, based on the Westminster system of government, has proved to be extremely stable and robust, with elections held every three years. The country is among the most safe and secure in the world as a travel destination, despite the dangers and harshness of the natural environment. The government is led by the Prime Minister, supported by a cabinet of elected ministers. Corruption, when discovered, is not tolerated as an accepted activity and a strong value of fairness and integrity still epitomises the broad expectations of the populace.