We want more people to have more opportunities to participate in community governance.And quadratic voting can effectively enhance everyone's sense of participation.So it can enhance community cohesion.
What is Quadratic Voting?The simple explanation is that 16 yam are equivalent to 4 votes, 100 yam are equivalent to 10 votes, and 10000 yam are equivalent to 100 votes.
This Mechanism Design Can Radicalize Democracy.Only quadratic cost induces marginal costs linear in votes purchased and thus welfare optimality if individuals' valuation of votes is proportional to their value of changing the outcome.
For more information,you can read vitalik's post: https://vitalik.ca/general/2019/12/07/quadratic.html