youre taking the honest (but profit motivated) voters out of the system. That is to say, the bad fish might be the same sized fish

One possibility is stakes of sockpuppet voters are much greater than curators. But I think abusing the system will bring more stakes from the inactive to curation, especially for moderation (downvote abusers) because abusing consequently shrinks the pie so some investor on the edge are willing to give up incentives to prevent abuse.