Should I prohibit a player from having a character goal that makes me uncomfortable?

Me (Gamemaster) and a few friends are gearing up to start a FATE game set in a society inspired by ancient Greece, with a direct democratic political system.

One of my players wants to play a wealthy merchant transitioning into politics, and has outright mentioned wanting to use his wealth to buy votes/sway the system.

This sort of thing makes me really uncomfortable because of its effects in real life. I think having a player character pursue this sort of goal would lessen the fun for me as the game master, as it would serve as a constant reminder of the sort of stuff that goes on IRL. It’s the sort of thing I would consider an appropriate method for a villain, not a PC.

I don’t want to be the moral police and get in the way of him playing a character he enjoys, but I also want to have fun without grappling with this issue in my game.

Should I talk to him about it and encourage him to pursue alternative ways of achieving his character’s goals? I could just have it be really difficult to do in the game, because this society is partially setup this way because of people that have tried to do this in their history, but I honestly think this is an out of character issue, because it makes me as a person uncomfortable.