I agree completely that champions are important, and their network across departments is really key, because that's where they share best practices. They can also bring back the information they obtain and promote it within their departments.
At PCO we do have a champion. To address what Renée's talking about, our deputy secretary, who's the champion, is also the deputy secretary for operations, which sees maybe 80% of all the proposals that come to cabinet. He has huge oversight over this and is well situated to promote it. We also ask him to do little things like track down those executives who haven't done their training yet. So come September, if they haven't done their training they'll get a call from the champion.