Why is independence such an important standard for auditors? How does independence relate to the agency relationship between owners and managers?

Independence is a bedrock principle for auditors. If an auditor is not independent of the client, users may lose confidence in the auditor's ability to report objectively and truthfully on the financial statements, and the auditor's work loses its value. From an agency perspective, if the principal (owner) knows that the auditor is not independent, the owner will not trust the auditor's work. Thus, the agent will not hire the auditor because the auditor's report will not be effective in reducing information risk from the perspective of the owner.