My arguement is against this because it's not a true representation of how helpful people really are. Also it promotes the idea of a social hiearchy which is open to bias from favoritism. What you said is true sabert00the in theory, but in practice I doubt it'll work that way. For example someone may not like someone and make it their mission to go rounding giving that user negative karma. See what I mean, it's so open to corruption and unjust karma in this case