industries where they are most in demand and to withdraw resources from industries where
there is a relative oversupply of commodities. The market, in short, allocates resources so
as to most efficiently meet consumer demand, thereby promoting social utility. As such, all
available resources are used and demand always expands to absorb the supply of
commodities made from them (a relationship called Say’s law). The best thing for
government to do is nothing; the market, on its own, will advance the public welfare, giving
people what they want for the lowest possible cost.
In the early twentieth century, economists Ludwig von Mises and Friedrich A.Hayek
supplemented Smith’s market theories by an ingenious argument. They argued that not
only does a system of free markets and private ownership serve to allocate resources
efficiently, but it is in principle, impossible for the government or any human being to
allocate resources with the same efficiency. Human beings cannot allocate resources
efficiently because they can never have enough information nor calculate fast enough to
coordinate in an efficient way the hundreds of thousands of daily exchanges required by a
complex industrial economy.
It is important to note that, although Adam Smith did not discuss the notion of private
property at great length, it is a key assumption of his views. Before individuals can come
together in markets to sell things to each other, they must have some agreement about
what each individual “owns” and what each individual has the right to “sell” to others.
Unless a society has a system of private property that allocates its resources to individuals,
that society cannot have a free market system.
Smith’s utilitarian argument is most commonly criticized for making what some call
unrealistic arguments. First, Smith assumes that no one seller can control the price of a
good. Though this may have been true at one time, today many industries are monopolized
to some extent. Second, Smith assumes that the manufacturer will pay for all the resources
used to produce a product, but when a manufacturer uses water and pollutes it without
cleaning it, for example, someone else must pay to do so. Third, Smith assumes that
humans are motivated only by a natural, self-interested desire for profit. This, say his
critics, is clearly false. Many humans are concerned for others and act to help others,
constraining their own self-interest. Market systems, say Smith’s critics, make humans
selfish and make us think that the profit motive is natural. As for von Mises and Hayek’s
contention that human planners cannot allocate resources efficiently, example of the
French, Dutch, and Swedes have demonstrated that within some sectors of the economy it
is not quite as impossible as imagined. However, it is possible only if it is but one
component within an economy in which exchanges are, for the most part, based on market
forces.
One especially influential critic of Smith was John Maynard Keynes. Keynes argued that
government intervention was necessary because there is a mismatch between aggregate
supply and demand, which inevitably leads to a contraction of supply. Government,
according to Keynes, can influence the propensity to save, which lowers aggregate demand
and creates unemployment. First, government can prevent excess savings through its
influence on interest rates, and it can influence interest rates by regulating the money
supply. The higher the supply of money, the lower the rate at which it is lent. Second,
government can directly affect the amount of money households have available to them by
raising or lowering taxes. Third, government spending can close any gap between aggregate
demand and aggregate supply by taking up the slack in demand from households and
businesses through government expenditures. Keynes’ arguments became less convincing
after the stagflation (simultaneous occurrence of inflation and unemployment) of the 1970s,
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