Education spending will be most effective if it relies on parental choice & private initiative — the building blocks of success throughout our societ… - Milton Friedman

A government which maintained law and order, defined property rights, served as a means whereby we could modify property rights and other rules of the economic game, adjudicated disputes about the interpretation of the rules, enforced contracts, promoted competition, provided a monetary framework, engaged in activities to counter technical monopolies and to overcome neighborhood effects widely regarded as sufficiently important to justify government intervention, and which supplemented private charity and the private family in protecting the irresponsible, whether madman or child—such a government would clearly have important functions to perform. The consistent liberal is not an anarchist.

almost all professions requiring licensure, people may try to get admitted more

Why should they also be accepted by private persons in private transactions in exchange for goods and services?
The short answer—and the right answer—is that private persons accept these pieces of paper because they are confident that others will. The pieces of green paper have value because everybody thinks they have value. Everybody thinks they have value because in everybody's experience they have had value...