Voting power will never be equal in Steem, that goes against the concept and is easily undermined by Sybil attacks. However they do recognize the centralizing aspect of having disproportionate power in a few people. You should check out their recent posts on the matter, such as this one:

https://steemit.com/steemit/@dantheman/follow-up-to-people-rank-algorithm-for-better-curation-rewards