Sounds like a renamed version of the karma system. I really don't want this place to become exactly like other sites. I'm sure the creative freestylers can come up with better ideas than this.
Edit:Another reason is that people aren't held accountable or don't provide reason. This is why the Karma system failed. If someone has had a number of good posts in the past and then someone comes along with a grudge or notices they haven't been posting many good posts, they just down voted every hour until it was at a number they deemed worthy.