Jonah Goldberg does not state that the report concludes that Clinton is a "breathtakingly consistent and brazen liar." He states that those are NOT the words the IG report uses but the inference is there. It could be that Hillary thought she could get away with violating department regulations since there was no IG at the State Department from 2009 to 2013 to make sure she used proper procedures.
Just an additional observation. Hillary is now saying she "believed" she was doing the same as previous secretaries. Another lie, since she knew previous secretaries did no such thing. At least that is what she has said up until now.