In 2011, for example, the federal individual income tax averaged 11.5 percent of AGI but just 9.3 percent of total cash income, the much broader measure of income that TPC generally uses for its analyses.

FORBES: A 102% Tax Rate? Really?

This would mean that the total income for these folks includes some real phat cash.

FORBES: Mr. Buffett's Secretary is One of "Them"