Final answer:
Friedrich Hayek is the economist who believes that the government is always less efficient than the private sector and supports using policy to privatize.
Step-by-step explanation:
The individual who believes that the government is always less efficient and therefore aims to use policy to privatize is Friedrich Hayek. Hayek, an Austrian economist, famously argued against central planning in his book 'The Road to Serfdom,' where he asserted that such governmental control leads to inefficiency and could result in totalitarianism. He advocated for a free-market system, maintaining that it enables the efficient and rational allocation of resources, in contrast to a planned economy where the government sets prices, leading to economic imbalances and a lowered standard of living.