Good point about the richest investors not being the ones who will work hardest at the job of curation, they have no real reason to. Splitting the curation rewards away from vesting is also an excellent idea. Incorporating lifetime # of votes into curation power seems possible, if it can somehow be compared with other voters history to prevent gaming. Add in a little Trickle Down curation rewards to further spread the curation power around, and this could really help.