“At worst, he personally ordered it done and chose the people who executed the plan. At the very least, he fostered an attitude within the party [...], chose the managers of the people who committed these crimes and completely and utterly failed to exercise any oversight, supervision or leadership. In the end, it doesn’t really matter where [his] actions or lack of them fall on that scale. He is the leader and a leader is responsible for the actions of the people he leads. If he had a right or honourable bone in his body, he’d admit that and resign immediately.”
In the meantime, have a look at the longer genuine statement Harper made on corruption that I posted here - almost as full of ironic goodness - Harper's View on Government Corruption - 2005.