Why no modern nations have purely free market economy

Pure market economies do not exist because when markets are allowed to freely function, and economic decisions are reached by the interaction of individuals, firms and government in the markets, these lead to sharply unequal outcomes and social welfare is threatened.

Explanation:

Basically because it will make things unequal and social welfare is at risk

the awenser wuold be slaves

the virginia plan called for three branches of government and two houses of congress. representation in each house would be determined by population. the new jersey plan called for three branches of government and a single house of congress. each state would have an equal vote.