I have seen five written, and that one doesn't seem unreasonable, but somebody might present a reason why it was unreasonable.
I think we'd want to be careful, or at least not have it so that people who could never get elected were on it. All you have to do is go on social media, there's stuff that gets said in the political discourse that would be better left unsaid and it's inappropriate by almost any standards. If something provided ready access to seats in Parliament for an opinion that could never get elected in any one district anywhere in the country, it would be problematic. Maybe you'd have to get a couple of seats on your own merit to get add-on seats. I don't know. I think there are ways to put that in. I think some countries in Europe have a problem, in that they get some pretty, to put it mildly, adamantly anti-immigrant parties, bordering on a lot worse, that end up with seats because of the structure.