Why do people around the world have so much faith in the free markets?

The free market depends on the demand of the mass. Let us face it, not everyone in the world is fortunate enough to be categorized as rich who usually gets more than others. As long as there are people who can not afford fixed prices which does not curb to the demands of the majority, and the majority are not rich, then the free market will still have the faith and support of most of the people of the world.