I don't think shifting the %10 around is a good idea, but I don't necessarily think its a bad idea as well. Keep in mind that you are gonna be giving curation services being delegated millions of HP even more power this way. With the %10 increase in inflation, who's to say people who were raking in the %20 aren't gonna delegate their stacks to these services?
I would also add that this will probably affect coin distribution negatively, where blocktrades can pass a proposal almost single-handedly. This will give much more governance power to big holders, and fuck over small holders. My 2000HP stake getting a 1% extra due to inflation and someone holding a million HP getting 1% extra due to inflation is not really the same.
And I would say there is a conflict of interest aspect as well, since Witnesses get paid in Hive. So giving more to staked hive, basically means they are paying themselves more.
This is the other thing I'm afraid of. They are gonna get even more powerful as time goes on. This also essentially punishes content creator who deservedly should receive a proper stake in governing the chain. %10 to Hive inflation simply steepens the ramp