"Were you thinking the rich should pay no more than their share of income?"

Not at all,  I'm simply pointing out that the ratio get more out of whack as you go up in income.  For example:
-The avg taxpayer in the $200-$500k bracket makes 6.4 times a much as the avg in the  $40-50k bracket but pays 20 times a much in income tax.
-The avg taxpayer in the $500-$1 Million bracket makes 11 times a much as the avg in the  $50-75k bracket but pays 34 times a much in income tax.

One thing that exacerbates that is that, as income goes up, deductions and exemptions are a lower percentage of AGI.  As income does down, a higher percentage is excluded!