They are not politicians though, they are businessmen, and very bad ones at that.
If Kojima doesn't want to keep doing MG, why would you kick him and his team out, as KojiPro is disbanded already, become the pinnacle of every shitlist available by removing the creator's iconic tag and the dev teams logo, and then form a new team to work on MG, when you could keep one of the most iconic figures in the industry, have him make the games he wants, which will certainly sell a fuckton just for having his name on, let him keep his team to do so, and make even more money by forming a new team to do MG.
I mean seriously, why?