Let me pick up on one point. The Fraser Institute authors claim the following.
In addition to the multitude of private organizations supplying economic forecasts and fiscal projections, others still go to great lengths to scrutinize the accuracy of government budget numbers and assess its fiscal policies and programs. These include think tank institutions (including our own), lobbyist groups, and professional and academic economists. In a sense, the government already has multiple “watchdogs” keeping it honest and disciplined.