An interest group's primary responsibility is to

Interest groups are associations of individuals or organisations that on the basis of one or more shared concerns, attempts to influence public policy in its favour usually by lobbying members of the government. Interest groups influence on policy making is not a corrupt or illegitimate activity per se, but a key element of the decision-making process. However, disproportionate and opaque interest group influence may lead to administrative corruption, undue influence, and state capture, favouring particular interest groups at the expense of public interest