Very briefly, the CBA has no position on that. You can take from the negative recommendation the CBA is not advocating changing that.
I'll add this. When you're looking at who is a designated public office holder, what counts is not what you know, it's who you know, because the restriction is on making contacts. It's not important that someone had secret information, or didn't, in his or her head; it's important that he or she knows that.
My personal view is that senators and members of the House of Commons absolutely fall into the category of people who have contacts they can utilize for profit when they leave and should be covered by the ban.