Crypto is Not Politics
That's like saying consensus has nothing to do with consensus. Luckily there is also the market which has its own way of voting on things.
Yes. It is all economics (game theory) after all. The key is that is becomes very impractical to move for such a vote, just as due to Hash equilibrium it is not practical for the nodes to gang up and 51% attack.
The Ethereum miners are preparing for a 51% attack on the block chain, to for it. Maybe 75% of the miners will attend.
Yes because they each have too much power thus they can coordinate.
But in normal free market systems in nature, entropy disperses and people can't agree on anything.

Ethereum is basically a closed system that does nothing but mint BTC for Ethereum miners. So of course all the ETH miners have aligned on keeping the pump alive.
Natural disagreement is the key to my solution.