Blackmail is a good point.
From what I've read, that's one of the primary reasons this investigation went anywhere...because that's always going to be a concern when you have irregularities in the lifestyles, transactions, substance abuse, and relationships of peoplein high profile/sensitive positions.
I'm as big an advocate of privacy as anyone on here, but when a person enters public service they should expect some compromise and transparency in that area...if they don't, I would suggest they entered public service for the wrong reasons.