Economists distrust constitutions which rely on trust towards the citizens. Rather, they favour strict over lenient public laws, because they prevent people from behaving in an opportunistic and exploitative way. The view that human beings act as knaves, if given the opportunity, forms the basis of Constitutional Economics (in particluar Brennan and Buchanan 1983). It is also reflected in the works of David Hume and John Stuart Mill :'In contriving any system of government, and fixing the several checks and controls of the constitution, every man ought to be supposed a knave, and to have no other end, in all his actions, than private interest'.