I note that capital markets exist because capital gains exist. Expecting self votes to be necessary to gains is metaphorically comparable to a stock investor in a broom company expecting to receive the change that is swept up with brooms the company sells.
It is neither necessary, nor does it promote the appreciation in the underlying company. In fact it directly impedes it.
The white paper states "In the real world, algorithms must be designed in such a manner that they are resistant to intentional manipulation for profit. Any widespread abuse of the scoring system could cause community members to lose faith in the perceived fairness of the economic system."
While they state weighting VP (vote power) by SP held by the account is intended to prevent sybil attacks, in fact such weighting merely replaces number of accounts with number of SP. Since it is less expensive and far faster to deploy lots of SP than it is to deploy many accounts with separate votes, the present system makes sybil attacks far easier and less expensive.
Self votes, and coordinated cliques, are sybil attacks.