If that were the case, why do Republicans spend so much effort on suppressing voter turnout and establishing ever more onerous registration and "fraud prevention" regimes, especially in poor and black neighborhoods? The 2000 presidential election in particular was probably swung by bogus enforcement of felon-voting prohibitions.

It's a nice idea that we'd have a better government if only qualified people had the vote. Who decides who's qualified: you, or the crypto-segregationists who keep complaining about unqualified voters in the National Review? I can guess who's more likely to have a say.