Canada emerged from the war with better cooperation between the federal and provincial governments. This led to a welfare state, a government-funded health care system and the adoption of Keynesian economics. In 1951 section 94A was added to the British North America Act, 1867 to allow the Canadian parliament to provide for pensions. This was extended in 1964 to allow supplementary benefits, including disability and survivors' benefits. The era saw an increase in First Ministers' Conferences to resolve federal-provincial issues. The Supreme Court of Canada became the court of final appeal after the 1949 abolition of appeals to the Judicial Committee of the Privy Council and parliament received the power to amend the constitution, limited to non-provincial matters and subject to other constraints.