Might be better to have a hubs and authority score. It could be “being a good producer” and “being a good judge” are different things. Problem is you can clone somebody’s hub score by stealing their judgements.
Yes I agree with this in principle. Although in this case what "good" is, is ill-defined - or rather different to everyone. The scoring each person performs is actually most directly a statement of utility to the scorer. That should probably go into the piece as an edit :-)
Any rating thst isn't bribe proof or mutual ranking proof will get instantly gamed and you end up in a neofeudalism.