GAO: Most U.S. Corps. Don't Pay Income Tax

Excerpted from The Associated Press:

The Government Accountability Office is set to release a report that says most U.S. corporations pay no federal income taxes.

And most foreign companies that do business in the United States aren't paying corporate taxes.

The study says about two-thirds of American corporations paid zero income taxes to Uncle Sam between 1998 and 2005.

An even higher percentage of foreign corporations avoided federal corporate taxes. At the same time, said the GAO, the firms had trillions of dollars in sales.

And yet I who struggle below the poverty line have to pay taxes? Correct me if I am wrong, but wasn't the income tax originally aimed at corporations?