but I think Chaffetz isn't wrong here. (that was painful to type)
Yes there are bigger fish to fry and I disagree with Chaffetz currently preventing/dragging feet on investigating Republicans, but Pagliano ignored subpoenas. Not just stonewalling with "I plead the fifth/On the advice of counsel I decline to answer". He just didn't even bother to show up. He had to know the consequences of that.
If we regain power in 2 years and were investigating some Trump scandal and a witness no-showed a subpoena, we'd be upset they blew it off too and would look to prosecute in order to compel testimony/diminish likelihood of future obstruction.