How do interest groups help improve the principal-agent relationship between politicians and voters?

Question

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Interest groups provide valuable information about constituents' preferences, the effects of policies, and the actions of politicians. This information helps to improve the principal-agent relationship, as it allows politicians to make more informed decisions that better reflect the desires of their constituents. By sharing this information, interest groups act as a bridge between voters and politicians, helping to ensure that the principal-agent relationship is more responsive and accountable. Furthermore, interest groups can also serve as a check on politicians who do not follow through on their commitments to voters, which can help to improve the overall accountability of the political system.

How Do Interest Groups Help Improve the Principal-Agent Relationship Between