Free-market-oriented economists since Milton Friedman have strongly criticized the efficiency of democracy. They base this on the argument that voters are irrational, among other things. Their criticism towards democracy is that voters are highly uninformed about many political issues, especially relating to economics, and have a strong bias about the few issues on which they are fairly knowledgeable.
The masses are not adequately educated to be able to foresee the betterment of the community they belong to, and therefore are unable to cast a vote to that effect. But given the right to vote, an uneducated man would certainly cast a vote which will more likely be wrong as effected by the personality charisma of the candidate or some other superficial reasons. An ordinary voter may also be lured into casting a vote on the basis of financial help or some other petty promises.