George Reisman sets the record straight:
"... Laissez-faire capitalism has a definite meaning... Laissez-faire capitalism is a politico-economic system based on private ownership of the means of production and in which the powers of the state are limited to the protection of the individual's rights against the initiation of physical force. This protection applies to the initiation of physical force by other private individuals, by foreign governments, and, most importantly, by the individual's own government. This last is accomplished by such means as a written constitution, a system of division of powers and checks and balances, an explicit bill of rights, and eternal vigilance on the part of a citizenry with the right to keep and bear arms. Under laissez-faire capitalism, the state consists essentially just of a police force, law courts, and a national defense establishment, which deter and combat those who initiate the use of physical force. And nothing more.
The utter absurdity of statements claiming that the present political-economic environment of the United States in some sense represents laissez-faire capitalism becomes as glaringly obvious as anything can be when one keeps in mind the extremely limited role of government under laissez-faire and then considers the following facts about the present-day United States..."
Continue reading: http://www.mises.org/story/3165