Canadian Senator Douglas Roche, O.C., argues in "The Case for a United Nations Parliamentary Assembly" that even an indirectly elected UNPA consisting of delegates appointed by national parliaments could create additional checks and balances by providing for oversight by a parliamentary body that would be independent of member nations' executive branches. It would open up the global policymaking process to a larger group of elected officials by shifting some power from the relatively small executive branches of countries to the larger legislative branches. According to Roche, globalization has tended to increase the power of the executive branch while marginalizing the legislative branch; for instance, U.S. Presidents since George H. W. Bush have been given authority to negotiate trade agreements, subject to a "yea or nay" scrutiny by the U.S. Congress on the negotiated deal. A Property and Environment Research Center report argues that changes in the Organisation for Economic Co-operation and Development are another example of how international regulation removes checks and balances between the branches of government: "The OECD was created by a 1961 treaty, ratified by the U.S. Senate, to help achieve economic growth. In April 1998, a ministerial meeting reinterpreted the treaty, adding social and environmental considerations to the economic ones. The United States executive branch agreed to the changes, but the Senate had no opportunity to debate this treaty, even though it was significantly different from the 1961 treaty. The executive branch had essentially negotiated a new deal without Senate approval." World Federalist Canada Briefing Paper No. 30, however, suggests that UNPA proposals may spark opposition from the executive branches that stand to lose power: "Experience has shown that civil servants and diplomats working in national foreign ministries are less likely to support or see the need for a UNPA. They view the UN as a forum for discussion among sovereign states; whatever action the UN takes is a result of bargaining and compromise among member states".