Sjafruddin Prawiranegara (EYD: Syafruddin Prawiranegara; 28 February 1911 – 15 February 1989) was an Indonesian statesman and economist. He served in various roles during his career, including as head of government in the Emergency Government of the Republic of Indonesia, as Minister of Finance in several cabinets, and as the first Governor of Bank Indonesia. Sjafruddin later became the prime minister of the Revolutionary Government of the Republic of Indonesia, a shadow government set up in opposition to the country's central government. Originating from Banten with Minangkabau ancestry, Sjafruddin became active in politics after his education in law. By 1940, he was working at a tax office, and joined the nationalist movements during the Japanese occupation period (1942–1945). Due to his closeness to the revolutionary leader Sutan Sjahrir, he was appointed finance minister in the Republican government during the Indonesian National Revolution (1945–1949). In this capacity, he lobbied for and distributed the , a predecessor currency to the Indonesian rupiah. Despite his socialist views, he joined the Islamic Masyumi party. In December 1948, a Dutch offensive captured the Indonesian revolutionary leaders including President Sukarno, resulting in Sjafruddin activating contingency plans and forming the Emergency Government of the Republic of Indonesia on 22 December. For seven months in West Sumatra, he became the head of government of Indonesia, allowing the government to continue functioning and ensuring continued resistance. Following the Roem–Van Roijen Agreement – which he had opposed – Sjafruddin returned his governing mandate to Sukarno in July 1949. With Indonesia now independent, he was first appointed deputy prime minister, then reappointed as finance minister until 1951. One of the party's leaders and its most prominent economic policymaker, he maintained a conservative approach to government budgets and established a foreign exchange certificate system. In order to reduce the money supply and curb inflation, he formulated the "Sjafruddin Cut" policy which involves physically cutting Dutch-issued banknotes in half. He then became the first governor of Bank Indonesia, where his general accommodative approach to foreign capital and opposition to nationalization caused tensions with the Sukarno government and economists such as Sumitro Djojohadikusumo. A pragmatic policymaker, he espoused religious socialism and based his views on a liberal Islamic interpretation and was a staunch opponent of communism. His opposition to Sukarno's Guided Democracy along with Dutch–Indonesian tensions caused a significant split between Sjafruddin and the Sukarno government. Escaping to Sumatra, he made contacts with dissident