Milton Friedman articulates this as well as anyone I've heard. http://www.youtube.com/watch?v=-P9Y4H2GyS4
When the income tax was first introduced it was only for the top 1%. Of course they had to have enforcement, so the IRS was created.
Now look at the monster that has been created to rob us of our hard work and our freedom.
One of these days the bubble has to burst. And it aint gonna be pretty for them.