If not for the deliberate sharing by the IRS of Tea Party/conservatives' information with other government agencies such as ATF, FBI, OSHA, DEA, etc., and with Democrat election activist groups as opposition research, and for harassment/intimidation, I might believe it was just CYA for potential I.D. theft.
It seems clear to me this is not about accidental identity theft, so much as giving themselves the right to use that information as a weapon to cripple their political opposition.
It's deliberate authoritarianism.
Potential identity theft is just the by-product.