Literacy test to vote?

Fred Reid writes,

Allowing the foolish to vote makes likely the election of the equally fatuous, or of a wily confidence man.

Therefore, Fred proposes:

For voting in federal elections, we should employ a literacy test to disenfranchise the majority of the population, to the infinite betterment of the country. This wise move should be accompanied by an increase in the voting age to twenty-five.

Read more here.