People are not embracing collectivism because they have accepted bad economics. They are accepting bad economics because they have embraced collectivism.

Socialism is an alternative to capitalism as potassium cyanide is an alternative to water.

Give a man a fish, and you feed him for a day.

Teach a man to fish, and you feed him for a lifetime.

Steal a fish from one guy and give it to another--and keep doing that on a daily basis--and you'll make the first guy pissed off, but you'll make the second guy lazy and dependent on you. Then you can tell the second guy that the first guy is greedy for wanting to keep the fish he caught. Then the second guy will cheer for you to steal more fish. Then you can prohibit anyone from fishing without getting permission from you. Then you can expand the racket, stealing fish from more people and buying the loyalty of others. Then you can get the recipients of the stolen fish to act as your hired thugs. Then you can ... well, you know the rest.

A man who chooses between drinking a glass of milk and a glass of a solution of potassium cyanide does not choose between two beverages; he chooses between life and death. A society that chooses between capitalism and socialism does not choose between two social systems; it chooses between social cooperation and the disintegration of society. Socialism is not an alternative to capitalism; it is an alternative to any system under which men can live as human beings.

Socialism is not really an option in the material world. There can be no collective ownership of anything materially scarce. One or another faction will assert control in the name of society. Inevitably, the faction will be the most powerful in society -- that is, the state. This is why all attempts to create socialism in scarce goods or services devolve into totalitarian systems of top-down planning.

Monopoly is a market, or part of a market, reserved to the exclusive possession of one or more sellers by means of the initiation of physical force by the government, or with the sanction of the government. Monopoly exists insofar as the freedom of competition is violated, with the freedom of competition being understood as the absence of the initiation of physical force as the preventive of competition. Where there is no initiation of physical force to violate the freedom of competition, there is no monopoly. The freedom of competition is violated only insofar as individuals are excluded from markets or parts of markets by means of the initiation of physical force. Monopoly is thus a market or part of a market reserved to the exclusive possession of one or more sellers by means of the initiation of physical force. It is thus something imposed upon the market from without—by the government. (Private individuals—gangsters—can initiate force to reserve markets only if the government allows it and thereby sanctions it.)
Thus, monopoly is not something which emerges from the normal operation of the economic system, and which the government must control.