Principal Secretary to the Prime Minister of India the Government of India—was established after independence under the prime ministership of Jawaharlal Nehru, as a successor to the office of the Governor-General of India's secretary. Lal Bahadur Shastri appointed Lakshmi Kant Jha, an Indian Civil Service officer, as his secretary, making Jha the first secretary to the Government of India-ranked officer in the PMS. During Indira Gandhi's tenure as prime minister, the post of Principal Secretary to the Prime Minister was created; retired Indian Foreign Service officer P. N. Haksar became the first PS to the PM. The Principal Secretary to the Prime Minister of India acts as the
Prime Minister of India Congress. Subsequently, Morarji Desai—a former deputy prime minister—became the first non-Congress prime minister of the country. The government of Prime Minister Desai was composed of groups with opposite ideologies, in which unity and coordination were difficult to maintain. Ultimately, after two and a half years as PM; on 28 July 1979, Morarji tendered his resignation to the president; and his government fell. Thereafter, Charan Singh—a deputy prime minister in Desai's cabinet—with outside, conditional support from Congress, proved a majority in Lok Sabha and took oath as prime minister. However, Congress pulled its support shortly after, and Singh had to resign;