In 1901, he was appointed Registrar of Co-operative Credit Societies in the
Madras Presidency and then served as Assistant Collector from March 1902 until 1906, when he was appointed Diwan of Travancore state. The
Sadhu Jana Paripalana Sangham was established in 1907 by social reformer
Ayyankali to campaign for education for
Scheduled Castes. Rajagopalachari was supportive of the movement, and in 1907 the government of Travancore passed an order for the admission of scheduled castes children in schools. However, the Namboothiri-Nair caste landlords who owned most of the schools were obstinate in allowing scheduled castes children into their schools and openly defied the government order. A major strike erupted. Scheduled caste agrarian workers refused to farm their fields. In 1910, Rajagopalachari and Mitchell, who headed the education department, made the order for admission of Scheduled Caste children public, thereby putting an end to the controversy. Rajagopalachari also brought forth reforms in the administration. Scheduled Castes, who were previously excluded from the administration, were made eligible for nomination to the State Assembly. Ayyankali became the first Scheduled Caste member to be nominated to the Travancore State Assembly. Rajagopalachari also donated 8acres of land for the construction of an Islamic college by Sheikh Mohammad Hamadani Thangal. Rajagopalachari's administration had its own share of controversies.
M. A. Shakoor, in his biography of
Vakkom Moulavi, calls Rajagopalachari's administration "authoritarian". ==Later life and career==