Myth
It's not worth the trouble, Phil. "The rich don't pay any taxes" is one of those myths so deeply ingrained into the liberal brain that you couldn't pry it out with a crowbar.
What's really funny is that this myth is firmly held at the exact same time that liberals are screaming about "tax cuts for the rich" completely crippling the Federal Treasury. That these two are mutually exclusive doesn't bother them any more than any of the other inconsistencies of their philosophy.