I agree with you that we have misaligned incentive system, and think your suggestion would create better economic mechanism. However, it won't be the perfect system. There are still, while fewer, people to self vote in order to take all author and curation rewards.
Then, what do we answer to the new guys who seek maximum profit from the broken system saying they won't stop until the system fixes the hole? There will always be these sort of people.
The crux of problem is a mixture of rewards; investors want to maximize profits using contents rewards, and contents creators are competing with investors on the same resource.
I think we'd rather have to focus on SMT and separating the heterogeneous incentive system, and do experiments using different parameters with each SMT.