This also hints at why, in a free market, everyone who contributes is serving their fellow man -- striving to create products or provide services that people want or need enough to pay for. Without the marketplace, the hard work necessary to create those products and to provide those services would fall to the consumer, who literally CANNOT duplicate it except in a few, small instances.

People would mostly have to do without (really, are you gonna create your own automobile, from conception to finished product? Even creating your own sandwich from scratch is a major project -- growing the wheat and lettuce, creating the mayo, raising and then slaughtering the chicken, etc).

A properly-functioning market is the heart of civilization; without one, the rest of civilization falls apart.