I like parts of this. I think perhaps a more simple way to get there is get rid of posting rewards and make everything curation reward. A poster gets to curate his own post first of course and would have outsized curation rewards due to this. This would pay for their post. Right now it's easy for investors and writers to accumulate steem power but not curators- the most important group.
Hf19 is getting us much closer to really getting this system fine tuned.
A closer look at these issues is a mother step in the right direction.