However, a growing number of observers say the key to ending the problem of tax havens and corporate inversions is to lower U.S. corporate tax rates. As it stands, the U.S. has one of the highest rates in the entire world, while countries like the U.K. enjoy comparatively lower rates. Britain's rate stands at 20 percent, a rate that will fall to 18 percent in 2020.
Therein lies what some observers say is the key to curbing corporate tax sheltering: Cutting the tax rate to encourage repatriation and foster growth. In a recent CNBC interview, former Treasury Secretary Hank Paulson argued that an "antiquated, outdated tax system" encouraged tax cheating and was a barrier to economic growth.