What is the appropriate normative function of the discipline of Economics?

To break this question down more specifically:

1. What moral and ethical frameworks do Economists generally agree are the most appropriate to use for determining which economic activities, policies, or outcomes are “good” or “bad”, “just” or “unjust”, “beneficial” or “harmful”?
2. What role should Economists be playing in educating the public how to engage in economic activities for both their own personal good as well as the public good?
3. Whole role should Economists be playing in remonstrating policy-makers who implement “bad”, “unjust”, or “harmful” economic policies?
4. When socio-political conflicts arise between the competing interests of different economic actors, such as the wealthy versus the poor, employers versus workers, producers versus consumers, the public interest versus private interests, etcetera, what role should Economists be playing in mediating or ameliorating these conflicts?