IMO, fighting and letting the winner become Kage isn't even an option. Being a Kage means being a real leader, someone who can put togheter all the shinobis as one strong, solid village. That's exactly why I like the idea of a "Democracy"; the villagers get to chose their Kage. The only problem I can think about this, is that every village will obviously have some idiots who will just vote for the 1st person they see. And, as we all know, the entire village will suffer from their votes. This, is why I also like the idea of Admins (people smart enough to know what a vilage needs, and who's good enough to lead a village) chose the Kage. Anyway, this is only my opinion ^^.