In a liquidity trap, when interest rates hit rock bottom, high inflation expectations can help boost the economy. By using a strategic policy framework, it's best for the Central Bank to have an inflation target, while the Treasury sets output and inflation goals. This keeps inflation expectations high and leads to the best outcome. Even if the Treasury doesn't have an inflation target, following optimal output goals can still work well. If the Central Bank focuses on inflation but the Treasury controls fiscal policy, the result may not be as good.