Thatcher's talent and drive caused her to be mentioned as a future prime minister in her early 20s although she herself was more pessimistic, stating as late as 1970: "There will not be a woman prime minister in my lifetime – the male population is too prejudiced." In October 1961 she was promoted to the frontbench as Parliamentary Undersecretary at the Ministry of Pensions and National Insurance by Harold Macmillan. Thatcher was the youngest woman in history to receive such a post, and among the first MPs elected in 1959 to be promoted. After the Conservatives lost the 1964 election she became spokeswoman on Housing and Land, in which position she advocated her party's policy of giving tenants the Right to Buy their council houses. She moved to the Shadow Treasury team in 1966 and, as Treasury spokeswoman, opposed Labour's mandatory price and income controls, arguing they would unintentionally produce effects that would distort the economy.