The primary concern I am reading is that this would disincentive voting, but as @acidyo pointed out below, there are already many users not voting. The curation incentive is a nice addition, but I agree in that I don't think it is 100% necessary. I'm no economist, but as a user, removing it wouldn't really bother me. I would be happier knowing that whales aren't gaming the system than make a couple more pennies with my votes.