Good post.
Out of curiosity, what if the savings wallet was used for this also, where a holder of Hive could put non-governance potential Hive into the savings wallet to attract a percentage return as if it was active stake, but instead of paying out curation in Hive it paid out the "relative HIVE curation" in Hive converted to HBD.
It would make sense that this Hive wouldn't attract the same percentage as active stake, but perhaps 50-70% of the average return on "full curation". This would generate more HBD to trade, while reducing the inflation on Hive. If HBD drops significantly below 1, it can pay out in HIVE instead, which it would have earned as active stake anyway in curation. It would also give a reason to semi-stake HIVE on-chain instead of on-exchange and still have a 3 day (or shorter) unlocking period, keeping it within reach for trading if they choose .
Wouldn't this make HBD more "HIVE-backed" than the current mechanism and take away the need for the proposal and posts if enough people staked there for passive daily return to increase the flow of HBD? It could also be that the additional "lost curation" percentage for this automatically goes into a HBD-stabilizer mechanism to empower it further - or just remains in the pool for content distribution.
This would also mean that this kind of passive ROI seeking stake won't affect content curation activities, while still having influence on the rewards pool.
HIVE savings wallet earning a portion of inflationary staking rewards seems plausible to me. It would have to be a lot less given that it is staking for only 3 days vs 13 weeks (or 7 if you average), but some reward makes sense.
Implementation could be somewhat challenging.
Even at a lot less, it would be interesting to have it sit their earning something, rather than on exchange. since staked, it owuld be able to get something like 15-20% a year through voting, I think that without governance power and still leaving the reward half of the activity in the reward pool, it could still return a decent percentage. Paying out in liquid HBD daily would also be attractive for many people.
rough I know:
current vote on 10M HIVE
5000 dollars a day, ~2500 curation.
If the savings locked stake got 80% of that "curation" portion in HBD to increase supply of HBD and 20% went to the stabilizer to be converted (whichever way needed) - wouldn't this be an effective way to attract stake. If it attracted 50M of the exchange HIVE to rest in the savings wallet, 20000 HBD could be paid out with 5000 HBD to the stabilizer. This doesn't factor in the other half that would normally be pushed out to content, which can either stay in the pool for rewards or, be used for stabilization as well.
I am not sure if i have explained this well :)