You need at least 1 vote to get in, and there are other planets with only one base where he ran. Well, he runs on every planet in the universe that has a ADM, even Hubur. Good luck supplying there (and the other ~250 planets he runs on) in the case he would actually become a governeur.
But he has actually said that he has no intend of governing and wanted to step back when Saigo told him that he can be the gov of Dodai, and thus indirectly acknowledged that he is only running as a troll and not to do actual gov work.
One option to get harmful/useless players (in the gov context) away from gov would be to give faction govs the ability to blacklist a certain player from running in their space, needing 66/75% yes votes and limited to 3 months so that it isn’t permanent and it isn’t too easy to suppress minorities.
(Given that the players in the gov are weighted after the votes they got and not like now, as that would just lead to one political party having the absolute power).
My opinion would be a mix of both: having the blacklist for bigger troubles and a limit on how many planets you can run to be able to through a automated system like HQ level ^1,2 which means HQ 20 = 36 planets, Schaitr has 37 bases = HQ 36 (or more) = 73+ planets which is more than anybody actually does (Schaitr currently has seats on 36 planets). It could even be HQ^1,1 (20=27, 36=52).