Politicians and talking heads, of both the mainstream liberal and conservative persuasions, commonly refer to this as "our free market system," or maybe "free enterprise."
But Americans haven't had anything even remotely resembling a free market for over 150 years. (For that matter we didn't have one before, what with Enclosures, the Combination Law, mercantilism, slavery and colonialism.) Since the mid-19th century, what we've had is massive collusion between big government and big business.