Interesting, but how does it protect against vote monopolization? Also, alternatively, we could solve that problem simply by making witnesses stake STEEM with the potential for it being slashed. DPoS was brilliant in a world where slashed stake did not exist, but at this point in time it might be good for us to take a second look at the witness system and adjust it.
If we changed the witness system we would not need STEEM inflation for posting. Right now we have a system where the top 20 produce blocks and 1 random witness produces blocks but perhaps we could increase the number of random witnesses selected. This could improve decentralization and make the system much more secure against vote monopolization.
