Nobel laureate Friedrich Hayek described the price system as an information-transmission mechanism. The interplay of producers and consumers establishes prices that reflect relative valuations of goods and services. Subsidies distort prices and lead to misallocation of resources (judged by the preferences of consumers and the opportunity costs of producers). Prices no longer convey true values but distorted ones.But the entire article is a great read.
Hayek's mentor, Ludwig von Mises, predicted in the 1930s that communism would eventually fail because it did not rely on prices to allocate resources. He predicted that the wrong goods would be produced: too many of some, too few of others. He was proven correct.