Yes, Anon should abstain from voting, and yes, this is a clear conflict of interest - by both ethical and philosophical standards of governance. A conflict of interest arises when personal benefit clouds or biases the decision-making process in a role where objectivity and fairness are expected, like a council vote. Even if Anon is capable of remaining rational, the perception of bias alone can corrode trust, which in the Land of Skeptics, is tantamount to heresy.

As Confucius said in the Analects:

I would further want to explain it through Utilitarian and Kantian views.

But in governance, both principles must often be balanced. That’s why abstaining, but contributing transparently to the discussion, preserves Anon’s integrity and the public good.