Perhaps another idea would be to adjust Steem Power potency all together to indicate your level of "loyalty" to the protocol.

For example:

5000 STEEM powered up (staked) with a 4 week power down = $0.03 100% upvote
2500 STEEM powered up (staked) with a 8 week power down = $0.03 100% upvote
500 STEEM powered up (staked) with a 40 week power down = $0.03 100% upvote

This could allow for much more equality in distribution of STEEM rewards via smaller holders simply being willing to lock in to the system for longer.