Corporations don't pay income taxes. Care to elaborate and/or substantiate your claim of $30 billion paid.
It was revealed by one of the congressmen during the post-9/11 hearings on the $15 billion "bailout" of the airlines. Of course, it wasn't a "bailout" since the airlines were shut down for four days by government edict.
When I feel like digging through the Federal Register for the actual quote, I will, but this is after all an Internet discussion thread, not a way of life.