In 1952, Vaithianathan resigned from the post of Permanent Secretary, to be appointed by the Governor General to the
Senate of Ceylon and appointed
Minister of Housing and Social Services in the
cabinet of the newly appointed Prime Minister
Sir John Kotelawala. In 1953, he was also given the Industries portfolio following the resignation of
G. G. Ponnambalam, Minister of Industries and Fisheries. ==Social service==