Tell your complaining players to shut up and enjoy the game. A super charmer isn't gonna break the game and will probably bring a lot of money to the group.
Also dont forget to exploit the weakness of that min/maxing character.
Ah, yes... "Shut up and enjoy the game." Is there any statement *less* likely to result in the players enjoying the game? (Especially in the face of players who are actively telling you that there is something specific which is making them *NOT* enjoy the game?)
Diplomacy thy name is *not* vilainn6...