Austrian School economists, like Ludwig von Mises, insist that praxeology must be value-free—that the method does not answer the question "should this policy be implemented?", but rather "if this policy is implemented, will it have the effects you intend"?
Ludwig von Mises: "We must comprehend that it is impossible to improve the economic conditions of the underdeveloped nations by grants in aid. If we send them foodstuffs to fight famines, we merely relieve their governments from the necessity of abandoning their disastrous agricultural policies." - Money, Method, and the Market Process