We could have the Sergeant-at-Arms or the Speaker here, or the Board of Internal Economy, but I'm not sure how much more space our House of Commons could take in terms of increased numbers of members, unless we get away from the Canadian tradition, which is that every member has a place in the House of Commons, a seat, and adopt the British system of not having that and coming into a Parliament when one can.
We have increased the numbers recently in the past few years. I think, though, that you get to a point where the numbers become too large for people to grasp, and it's hard then to organize your very system. My view would be that it perhaps could be expanded more, but I don't think radically more. A House of 600 in Canada, for example.... Britain has roughly that with considerably more than our population.
I think you do begin to hit limits, and just adding more members is not a solution. As a member of Parliament, you could tell me the rough size of a riding. Probably anything much beyond 100,000 gets very difficult to service.