Sen. Max Baucus

Taxation of large U.S. multinational corporations would be dramatically overhauled by a raft of proposals unveiled on Tuesday by the U.S. Senate's top tax writer, though there is broad skepticism that they could become law anytime soon.

Democratic Senator Max Baucus issued a "discussion draft" that called for, among other things, repealing the present tax code provision that allows U.S. multinationals to park hundreds of billions of dollars in foreign profits offshore tax-free.