There’s an even broader dilemma here: any governance mechanism that is identity-free (ie. only relies on anonymous things like PoW or coin holdings to assign weight to participants and avoid sybils) is invariably vulnerable to bribes and plutocracy.
I go into this in details here: On Collusion
Personally I am increasingly thinking the cypherpunk movement should bite the bullet and start working on reasonable non-centralized identity systems (“reasonable” including stuff like privacy, lack of dependence on specific issuers, ability to have multiple pseudonyms at some cost, lack of easy backdoorability by state actors…). They don’t need to be baked into base-layer blockchain protocols but can exist on top and inform occasional governance decisions.
The approach in https://www.brightid.org is one place to start; pseudonym.party is another, etc etc. I know there are many people working on this.