The new Liberal talking point is that Mitt is hiding his money in Swiss bank accounts and Cayman Islands accounts and that releasing his tax returns would "expose" this which is ludicrous since declaring illegal activity on your tax returns is just about the dumbest thing anyone would ever do, and if he was doing something illegal, wouldn't he be under investigation?
I put my savings in a tax deferred account so I can "hide" it from taxation. I use the tax code as it benefits me. If I wouldn't, I'd be a moron. If the presumed future president of the United States can't figure out how to use the tax code to his advantage, could he really be trusted to run the country.
Obviously you're trying to spin this as a loophole. There are plenty of loopholes in the tax code for everyone if you look close enough which is why 50% of the American taxpayer doesn't pay any federal taxes.