The operation of the free market forces as stipulated by Adam Smith work only if you take a whole bundle of assumptions, as perfect competition and free entrance to market (which have become less realistic as economies of scale allow colossal corporations to dominate the markets). Therefore, there must be some natural mistrust on to what extent market forces are leading to optimal allocations of resources (as theorized), or just serving the private interests of an economic elite--the infamous 1%. Besides, even if one is to believe in such assumptions, the free market forces won't necessarily lead to socially desirable outcomes (markets will clear, which says nothing about the quality of things being produced or who's getting what). As As it turns out, we're reaching a point in which we either establish a political force that can control the market forces (guiding them to socially-desirable solutions), or market forces will keep leading to economic volatility and an unsustainable (in the socio-ecological sense) economic growth.
America is a capitalist country. The economy is a free market, and it is doing well. Although there are some government regulations in place, people who say that America is a socialism are misinformed. Real socialism looks very different, and truly socialist countries never have successful economies likes America does.
Americans focus on money, reality TV, and commercialism so much that it permeates our culture. Instead of being known for many specific types of music, food or holidays, Americans are known for their blatant consumerism and capitalism, putting the dollar before the person. America is one of the last remaining developed nations who does not even provide health care for all of its citizens due to capitalism.