Final answer:
The necessity of government regulation for a monopoly is uncertain as consumers' freedom to not purchase at high prices doesn't inherently counterbalance the market power of monopolies. Government intervention is context-dependent, considering actual market conditions and possible government imperfections.
Step-by-step explanation:
The statement that a fundamental feature of a market economy, which is that no consumer is forced to buy a specific number of units of a product and is free to decide not to buy if the price is too high, substantially weakens the economic case for the government to regulate the price charged by a monopoly for its product is uncertain. This is because the freedom of choice does not negate the market power that a monopoly holds over its product. Monopolies can set prices higher than in competitive markets due to the lack of substitutes, which can lead to a loss of consumer welfare and economic inefficiencies. In such instances, it might still be appropriate for the government to intervene to prevent prices from rising "too high" to protect consumers and maintain fair market conditions.
However, effective government intervention assumes that the government can accurately assess market conditions and implement appropriate measures without causing further distortions or inefficiencies. The relevant economic agents, both government and market entities, must weigh the actual strengths and weaknesses of the marketplace and the possible imperfections of government actions. There is no absolute answer, as the necessity and extent of government regulation depend on the unique circumstances of each market and the specific nature of the monopoly in question.