The document discusses several debates around macroeconomic policy: 1) Whether policymakers should stabilize the economy by boosting or cutting aggregate demand through fiscal and monetary policy when demand is too low or high. 2) Whether monetary policy should be rules-based or left to the discretion of central banks. 3) Whether central banks should aim for zero inflation given the costs and benefits. 4) Whether governments should balance their budgets or allow deficits, and the impact on debt and generations. 5) Whether tax laws should be reformed to encourage more private saving and long-term growth. Counterarguments note the impact on inequality and effectiveness.