Monopsony

Big business or big government often leads to monopoly and monopsony.

Source: tatoeba (12037825)

Our next task is to consider the change in the amount of a commodity purchased when the market changes from an indefinitely large number of competing buyers to a single buying agency. This may be described as the comparison between competitive and monopsony buying, just as the corresponding comparison for selling was called the comparison between competitive and monopoly output.

Source: wiktionary

It appears to follow that employment, far from falling, may be raised by an adroitly contrived legal minimum wage or collective agreement. Indeed, this proposition is an important one in the theory of both wage regulation and trade unionism. Its applicability is sometimes limited, however, even when monopsony is significant, by the danger that the employer may be driven out of business completely, as when, because of his own irremediable inefficiency or other objective disadvantages, monopsony profit achieved at his workers' expense is the differential between hanging on and outright failure.

Source: wiktionary

Examples of monopsonies are few. One limited monopsony is the U.S. federal government, which orders certain defense and security systems often with the condition that it be the sole client to be delivered the product, thus a monopsony. […] Indeed, any government is a natural monopsony, at least in some areas. Absolutist, state-run economies, like [Joseph] Stalin's Soviet Union or North Korea, are dominated by monopolies and monopsonies, which often are granted to cronies by those in power. […] In today's commercial markets, there are next to no true large monopsonies.

Source: wiktionary