People with those characteristics are often wealthy: can't have "real skin in the game" if you're just a pleb with a mortgage, 2 kids and 2 cars in a middle-class neighborhood, right? At which point, once again, those with $$ are more equal than others.
Sure, they might be better informed - which lets them figure out how best to corrupt the system.
Edit: in fact, I could see a strong reason to DISALLOW anyone in the top 1% to vote or spend any $$ towards the election.
1% of the vote isn't all that significant. It's the money that creates the problem.