the simplest answer to this is, the more voters we have, the more talent we have giving us input. Also our real source of income are users and the users know what they want.I am not too concerned about a voter's IQ (there is no way to restrict voting based on this). But there is a difference between a person determining that Dash is a good investment (anyone could do this), versus having experience managing wealth or being successful at making larger business decisions.
I can see the idea of the rich being able to spend money wisely but that is not the case, Kanye west is in like 50 million in debt and he's wealthy. Do you think he spends his money wisely? Probably not the smartest with his money, and there are plenty of other rich out there who lose their fortune because of poor decisions they made. It is definitely not a full proof system.