Huh?

The other night I was watching PBS, and this short little film clip came on. It was all about how income taxes are supposedly a huge conspiracy theory, set up in 1918 by a bunch of bankers who have been illegally taxing the entire country ever since then and making a huge profit from it. I'm disinclined to believe this - it sounds a bit far-fetched. I'm curious, though, has any of you ever heard anything like this before? Do you agree with me, or do you think it really is plausible that income taxes are imposed on us unconstitutionally? I just thought it was kind of an interesting perspective.