> simply rotation so everyone does the unwanted jobs. It's a fair system and people will do it.

I think that what would end up happening is that in even in a small group of people, it would naturally emerge that there are variations in quality, efficient, economies of scale, etc. Even in my immediate family, there are some menial jobs that my wife does 90-100% of and some menial jobs that I do 90-100% of. If we tried to make if 50-50 or have some type of rotation, we would both lose.