F.A. Hayek, The Road to Serfdom

It is not difficult to see what must be the consequences when democracy embarks upon a course of planning which in its execution requires more agreement than in fact exists. The people may have agreed on adopting a system of directed economy because they have been convinced that it will produce great prosperity. In the discussions leading to the decision, the goal of planning will have been described by some such term as "common welfare," which only conceals the absence of real agreement on the ends of planning. Agreement will in fact exist only on the mechanism to be used. But it is a mechanism which can be used only for a common end; and the question of the precise goal toward which all activity is to be directed will arise as soon as the executive power has to translate the demand for a single plan into a particular plan. Then it will appear that the agreement on the desirability of planning is not supported by agreement on the ends the plan is to serve. The effect of the people's agreeing that that there must be central planning, without agreeing on the ends, will be rather as if a group of people were to commit themselves to take a journey together without agreeing where they want to go: with the result that they may all have to make a journey which most of them do not want at all. That planning creates a situation in which it is necessary for us to agree on a much larger number of topics than we have used to, and that in a planned system we cannot confine collective action to the tasks on which we can agree but are forced to produce agreement on everything in order that any action can be taken at all, is one of the features which contributes more than most to determining the character of a planned system.

[Chapter Five: Planning and Democracy]