In 2009, roughly 47% of households, or 71 million, will not owe any federal income tax, according to estimates by the nonpartisan Tax Policy Center.
Some in that group will even get additional money from the government because they qualify for refundable tax breaks.
Here is how government spending has increased over the past 40 years. Blogger Joe Kristan argues this is what happens when a few taxpayers bear the burden of federal spending.
Here is a breakdown of how people voted in the 2008 presidential election based on income level, which seems to lend support to Joe's hypothesis. Those most likely to pay zero taxes overwhelmingly favor the party most in favor of expanding federal programs.
(HT Paul Caron)