From 1946 to 1957, Paul Martin and his deputy ministers at the Department of National Health and Welfare, George Davidson and G. Donald W. Cameron, worked to develop a national hospital insurance plan. Through the 1950s, Prime Minister Louis St-Laurent was concerned about infringing upon provincial jurisdiction, particularly since Duplessis had been re-elected as Premier of Quebec in 1944 and would remain in office until 1959. The outbreak of the Korean War in 1950 provided a convenient reason to slow progress on the proposal, but criticism from Stanley Knowles of the CCF kept the issue alive in the House of Commons. Within the Department of National Health and Welfare, Dr. Fred W. Jackson had been appointed head of the Health Insurance Studies division and he left Canada in the fall of 1951 to study sickness insurance plans and the role of the general practitioner in Norway, Sweden, Denmark, Holland and Great Britain. While he was away, health economists in the department were working with the Dominion Bureau of Statistics to analyze the data collected by the Canadian Sickness Survey carried out in 1950–1951. As the results of the survey were released, it became apparent that Canadians suffered a significant amount of illness on an annual basis and that this was not only costly to the individual but a great loss to the national economy. What could or should the federal government do?