Sen. Ted Cruz has been gunning to abolish the Internal Revenue Service since coming to Washington two years ago. To critics, it sounds like bluster. The fiery rhetoric garners hearty applause from conservative audiences, particularly since revelations in 2013 that the IRS targeted Tea Party groups for extra scrutiny. But some federal agency is going to have to collect taxes, so Cruz's vow to shutter the IRS smacks of a politically motivated campaign promise rather than serious policy at least to some.