1. Democratically voting members into the committee ( min 20 people to avoid corruption)
Democratic voting by who? Farmed accounts, shitposters and spammers? 
2. Make a fee for it and pay committee members and infrastructure
This would not be worth the effort/reward.3. Needs much more thinking to find a proper working solution. But I believe its doable!
Everyone says something like that, similarly for the trust system. Come up with a fully detailed solution that works both in theory and practice, and then we can talk about whether it's doable or not.