This is a pretty long, though very interesting video about income tax and why the IRS can't outright provide a reference to a law that requires us to pay it...
http://video.google.com/videoplay?docid=-1656880303867390173 EDIT: It covers a lot more than that... if you watch it, I recommend watching it to the end. I don't agree with everything brought up in the video but the stuff I do agree with or believe makes my stomache turn.