Killing fewer small bucks can do nothing but produce more larger bucks unless there is a food shortage. There is no logical way to get around that. Some curious reasoning in this thread.
Even knowledgeable hunters disagree on what to cull or not. There is no way to be sure what a buck will be next year, maybe an educated guess. And, I doubt you will find many who don't think they are educated. If you leave it to the individual to decide what to cull you will be right back killing everything because somebody will decide it needs to be culled if he has the itch to shoot something.