From John Adams, Defence of the Constitutions:

Such severe frugality, such perfect disinterestedness in public characters, appear only, or at least most frequently, in aristocratical governments. Whenever the constitution becomes democratical, such austerities disappear entirely, or at least lose their influence, and the suffrages of the people; and if an unmixed and unchecked people ever choose such men, it is only in times of distress and danger, when they think no others can save them. As soon as the danger is over, they neglect these, and choose others more plausible and indulgent.