Nelson D. Schwartz at the New York Times explains:

Even as Apple became the nation’s most profitable technology company, it avoided billions in taxes in the United States and around the world through a web of subsidiaries so complex it spanned continents and surprised experts, a Congressional investigation has found...In 2011, for example, one subsidiary paid Ireland just one-twentieth of 1 percent in taxes on $22 billion on pretax earnings from various operations; another did not file a corporate tax return anywhere and has paid almost nothing on $30 billion in profits since 2009.

“Apple wasn’t satisfied with shifting its profits to a low-tax offshore tax haven,” said Senator Carl Levin, a Michigan Democrat. “Apple sought the holy grail of tax avoidance. It has created offshore entities holding tens of billions of dollars while claiming to be tax resident nowhere.”

This is really shitty of Apple, of course. Apple CEO Tim Cook is scheduled to address a Senate hearing tomorrow. But the question remains: Is Congress going to do anything about this?