I find that very popular subjects do, in fact, manage to be relatively unbiased. E.g. Bush or Obama's Wikipedia page is pretty fair. The more eyeballs on a piec

I find that very popular subjects do, in fact, manage to be relatively unbiased. E.g. Bush or Obama's Wikipedia page is pretty fair. The more eyeballs on a piece, the less likely that egregious bias is to persist. Bias is a lot more prevalent in niche subjects that can go relatively unnoticed. Furthermore, a couple people can effectively lock down a rarely-viewed page and dominate edits. This wouldn't fly on a very popular page, admins would take notice.