Full employment on the free market

The “full employment” provided by the free market is em­ployment to the extent that workers wish to be employed. If they refuse to be employed except at places, in occupations, or at wage rates they would like to receive, then they are likely to be choos­ing unemployment for substantial periods.

... says Rothbard in Man, Economy and State (chapter 9). This is often forgotten. People talk about "unemployment" of men who want to work but simply cannot find any work! Rothbard explains why these men are out of work. Either they demand too much pay, or the government has made it too expensive for anyone to hire them (e.g. because of extensive benefits and taxes that follow each employee).