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It's how DPoS naturally is maximally decentralized and each Steem of every user wields equal weight on governance. It's how I think we all expect DPoS works. I haven't understood any good reason for it to be otherwise. I have understood bad reasons for it.

I have been discussing this for weeks, and only @smooth has presented what is a plausible reason for this election mechanism, but what I understood of the risk he discussed it reducing was far less harmful (a 1/3 +1 attack that prevents consensus) than the actual damage this election mechanism has long done to decentralization and now threatens to completely centralize Steem under one user.