Employment Minister Michaelia Cash shouldn't be a minister currently. She appointed Nigel Hadgkiss, whom she knew was the subject of well-founded claims that he'd broken the law, to head the Australian Building and Construction Commission last December. She's tried to argue that somehow she didn't, that he was appointed by some legislative magic and not her, and that it was OK anyway because they were only allegations made by the CFMEU.
As it turned out, even a cursory check of what Hadgkiss had done would have revealed how utterly inappropriate it was for him to be appointed to lead the new body. Cash should have resigned along with Hadgkiss.