Why do monetary and fiscal policies often operate at cross-purposes?

Monetary and fiscal policies often operate at cross-purposes due to their differing objectives and mechanisms. Monetary policy, typically managed by central banks, focuses on controlling inflation and stabilizing the currency through interest rate adjustments and money supply regulation. In contrast, fiscal policy, determined by the government, aims to influence economic activity through spending and taxation decisions. When one policy is aimed at stimulating growth, the other may inadvertently be tightening conditions, leading to conflicting outcomes and reduced overall effectiveness.