I think your suggestion is appropriate but would probably only shift the problem. The reason folks can rape the rewards pool is twofold.

• They have a LOT of followers/voters
• They have a few VERY wealthy followers/voters

The problem is that anyone can create a post or comment (regardless of quality) AND IF someone with a lot of Steem Power up-votes the post at full power they will recieve a LOT of money, as in hundreds of dollars. I saw one comment that earned ~$345 with just 4 up-votes and 3 were insignificant.

The reason this exists is because the folks who invest a LOT of fiat currency into the Steem platform expect and mostly deserve a return on their investment. If you could accept the risk and had a million $US to invest you could use that money to power up to a level that would allow you to self-vote or up-vote a second account at a rate that would earn far more than a conventional investment. This extra return is due to the extra risk.

That million $US is also what gives the rest of us solvency, i.e. it creates trust in the crypto-currency. NO currency has value unless enough people BELIEVE it does.

So, it's a tricky problem not confined to this platform. The folks with lots of money will always use that power to their advantage. The result is the rest of us get to eat off the crumbs. You know, they give us jobs, etc.
Many, maybe most, of the big investors (stakeholders) are in it for the long term, others are raping the rewards pool in the short term. But just like the fiat currency world while the rich folks do their thing the rest of us get to do ours, like eke out an existence. For this post to have earned $155+ with 40+ votes you know well how the game is played. BE happy, you're one of the successful ones.