In his last work, The Responsible Electorate (1966), the great scholar V.O. Key argued against the thinking of political scientists of his age that the mass public was too ill-informed to make wise decisions:
The victorious candidate…may regard his success as vindication of his beliefs about why voters vote as they do. And he may regard the swing of the vote to him as indubitably a response to the campaign positions he took, as an indication of the acuteness of his intuitive estimates of the mood of the people, and as a ringing manifestation of the esteem in which he is held by a discriminating public…
[However, t]he election returns establish only that the winner attracted a majority of the votes…they tell us precious little about why the plurality was his.
For a glaringly obvious reason, electoral victory cannot be regarded as necessarily a popular ratification of a candidate’s outlook. The voice of the people is but an echo. The output of an echo chamber bears an inevitable and invariable relation to the input. As candidates and parties clamor for attention and vie for popular support, the people’s verdict can be no more than a selective reflection from among the alternatives and outlooks presented to them. Even the most discriminating popular judgment can reflect only ambiguity, uncertainty, or even foolishness if those are the qualities of the input into the echo chamber. A candidate may win despite his tactics and appeals rather than because of them. If the people can choose only from among rascals, they are certain to choose a rascal. [Emphases Mine]