What are the roles of government in the market economy? Based the current economic conditions, to what extent should the government intervene in the market economy?

What are the justifications given in favor of more government involvement in the market economy? What are the reasons given in favor of less government involvement in the market economy?

Provide an example to discuss how special interests can succeed in perpetuating policies that are opposed by the majority of voters because the costs of organizing and motivating groups to take political action increase with group’s size.