My proposal, should it be feasible, is that in order for miners to have a vote they must prove that they have some stake in Spreadcoin's success. A collateral of sorts in order to ensure that they are in fact a community member and not some mercenary coming in to extract wealth from the community. A collateral ensures that they have a stake in the success of Spreadcoin, and thus have the incentive to vote in a meaningful way. A way which has Spreadcoin's best interest at heart. Of course other people would be able to mine the coin, but only those with X amount of Spreadcoin would be able to vote on the reward that goes towards the overlay network.
But that would be the essence of centralization.
One key factor of decentralization is to make it easy for newcomers to enter and compete.
Adding regulations of any kind always makes it harder for the newcomers, and further helps the already "established" early investors who already have more SPR than they can count.
Miner's aren't just extracting wealth from the community, they are solving ridiculously hard mathematical problems.
They are already burdened with the collateral they pay in the form of hardware and energy, and the reward they get they quickly sell back to the SPR community anyway. Often at dumping prices.
So it's a closed system, and not a problem that most miner's aren't really affiliated with SPR.