It's not so much what Arthur Sinodinos told ICAC that he knew. Or even that he proved to have one of the worst memories ever to speak on oath. It is just that the whole business of the New South Wales Liberal Party and its web of influences and fund raising gets worse and worse. Tony Abbott needs to take decisive action to stop the affair smearing himself.
Making the temporary ousting of assistant Treasurer Sinodinos permanent is a necessary step in doing that. If he wants to be kind to an old friend then the perfect excuse is to say that the ICAC enquiries are taking too long and that the needs of economic management mean the post must be filled. So, reluctantly, Arthur has agreed to step down. And quickly.