How do you measure enough? First, they likely pay lower rates than most. Earned income, money you actually worked for, is the most heavily taxed. Capital gains, investments and such get a major break. In fact, screw up and lose money and you get to deduct it.

But, most importantly, you can't possibly believe that the wealthy fat cats "earned" their income. They basically skim off the labor of others.

In any case, they are not paying enough taxes, at least not compared to what I pay. They may pay more in actual dollars, but what they take from me is far more valuable. What they pay is like a rounding error.