Registering them to vote is like handing out burglary tools to criminals. It is profoundly antisocial and un-American to empower the nonproductive segments of the population to destroy the country -- which is precisely why Barack Obama zealously supports registering welfare recipients to vote.
Encouraging those who burden society to participate in elections isn't about helping the poor. It's about helping the poor to help themselves to others' money. It's about raw so-called social justice. It's about moving America ever farther away from the small-government ideals of the Founding Fathers.
This ranks right up there with some of the ridiculous crap I've read lately, maybe ever. Our country was founded on the belief that people should be able to vote. The very act of voting is American. Therefore it would follow that encouraging or helping people to perform a civic duty like voting would be American, or at least encouraging others to act in an American manner. The reason he doesn't like it is because poor people tend to vote for Democrats. But just because you don't like something or a person votes for a different party than yours doesn't make it un-American. In fact, the ability that people have to make a decision that is different from Mr. Vadum's is fundamentally American.
To address the second paragraph quickly, the very concept of taxes involves spending other people's money and people receiving benefits from that spending. If you don't think this is a good concept that a gov't should partake in you should call yourself a anarchist and stop making over the top, blanket statements about taxes.