An income tax is the most degrading and totalitarian of all possible taxes. Its implementation wrongly suggests that the government owns the lives and labor of the citizens it is supposed to represent.
From Ron Paul's Website:
"About 45 percent of all federal revenue comes from the personal income tax. That means that about 55 percent — over half of all revenue — comes from other sources, like excise taxes, fees, and corporate taxes.
We could eliminate the income tax, replace it with nothing, and still fund the same level of big government we had in the late 1990s."