What I would actually appreciate was a source that would tell me the "real" taxes paid at every level. I don't know if one exists, but it would be a really interesting comparison.

I.e.: A source giving real percentage of taxes paid for each anual income. Why: because these here at the maximum taxes. These are pretty accurate for lower income people since they don't have many ways to avios paying taxes, but when you get to the very rich the number changes completely, they use a number of loopholes to avoid paying their taxes.