Yours, Etc.: Origins and Uses of 8 Sign-Offs
laissez faire, 1822, French, literally "let (people) do (as they think best)," from laissez, imperative of laisser "to let, to leave" (from Latin laxare, from laxus "loose;" see lax) + faire "to do" (from Latin facere; see factitious). From the phrase laissez faire et laissez passer, motto of certain 18c. French economists, chosen to express the ideal of government non-interference in business and industry.
French for “Let (people) do (as they choose).” It describes a system or point of view that opposes regulation or interference by the government in economic affairs beyond the minimum necessary to allow the free enterprise system to operate according to its own laws.