This is very good thinking, and I have recently posted almost identical thoughts regarding how high SP holdings really require those accounts to self vote. It's merely prudence and fiscal responsibility on their part.
However, as long as VP is weighted by SP, that will remain the case.
The only solution I have conceived is to let everyone's vote equally reward content. Either that, or weight votes by reputation, which has the advantage over SP of being a community approval rating, which has a sound basis for being a source of weighting.
Many object that without weighting votes by SP, investors will have no reason to maintain their holdings. This isn't true, or no cryptocurrencies would be held at all. Investors stake their capital in order to achieve a gain, and Steem is exactly the same as any other capital market.
Steemit, otoh, is not a capital market, and causing investment capital to affect curation negatively impacts curation. Votes are often cast to gain capital in the present system, rather than to reward great writing, or promote good ideas, and as long as SP weights votes, that will be the case.
You have a new follower.
Interesting thoughts!
(Sorry I just noticed them now, so that upvoting your comment wouldn't result in a reward anymore.)
I'm far more invested in gaining more insight into the issue than I am upvotes =)
I hope to benefit from any considerations you might arrive at from the discussion.
Thanks for letting me know there are still folks gaining insight on this here.