An interest or pressure group is an organized association that aims to influence the policies or actions of government. Sectional groups advance or protect the (usually material) interests of their members, while promotional ones are concerned with shared values, ideals or principles. Whereas insider groups enjoy privileged access to policy formulation, outsider groups lack access to government and so are forced to 'go public'. Group politics has been understood in a number of ways. Pluralism emphasizes the dispersal of power and the ability of groups to guarantee democratic accountability. Corporatism highlights the privileged position that certain groups enjoy in relation to government. The New Right draws attention to the threat that groups pose in terms of over-government and economic inefficiency. Organized groups benefit the political system by strengthening representation, promoting debate and discussion, broadening political participation and acting as a check on government power. They may, nevertheless, pose a threat, in that they en trench political inequality, are socially and politically divisive, exercise non-legitimate and unaccountable power, and make the policy process more closed and secretive. Interest groups exert influence through a variety of channels, including the bureaucracy, the assembly, the courts, the mass media, the parties and international bodies. The level of influence that groups have in a particular system, however, relates to how accommodating that system is to group activity in general, and to what access points it offers groups in terms of the distribution of policy-making power.