How do markets optimise the delivery of social services and social welfare? This question surfaces many of the challenges for the Austrian School, the philosophy that free markets and the price mechanism can do a remarkable job in managing people and their behaviour. While initially Friedrich Hayek’s theorising argued that the role of the State should be minimal, he ultimately conceded that some State regulation was required in order to maintain markets, and some other functions. For example, ‘[t]o prohibit the use of certain poisonous substances, or to require special precautions in their use, to limit working hours or to require certain sanitary arrangements, is fully compatible with the preservation of competition. The only question here is whether in the particular instance the advantages gained are greater than the social costs they impose.’ (The Road to Serfdom, p.38/9) The ultimate question of Hayekian liberalism is how much does the government have to interfere? What is the minimum possible function of government?