Did Senator Wyden's office also explain about the other exceptions to computing AGI?  I don't have time to analyze those references thoroughly, but these are what are included on that laundry list of Code sections:

86 = Taxable Social Security

135 = Savings Bonds used for education

137 = Adoption assistance paid by employers

219 = IRA's and other retirement plans

221 = Student loan interest

222 = Tuition deduction

469 = Passive Activity losses

I'm starting to picture a two-page worksheet.