Why does the government change the circular flow model of the free market system?

The government alters the circular flow model of the free market system to address market failures, promote equity, and ensure economic stability. By implementing policies such as taxation, subsidies, and regulation, the government can correct inefficiencies, provide public goods, and redistribute income. These interventions aim to protect consumers, support vulnerable populations, and foster overall economic growth. Ultimately, such changes help balance the competing interests of different market participants.