Interest driven government are able to respond to the different needs of different groups and people and its hence responsive to the course of society. It also encourages competition among different groups thus creating an environment for democracy to thrive.
There is however one single most challenge emanating from a pluralistic government. the problem emanates from the conditions of a political culture that is rampant with apathy and ignorance. This implies that only a few people are involved in interest groups and thus power tend to concentrate in a minority, impeding on democracy. This makes a representative democracy the best form of government as the people can always vote the reps out. <span />
Named by Theodore Roosevelt, these journalists/writers who tried to expose corruption and problems in society during the Progressive Era were called muckrakers.
A popular "muckraker" was Ida B. Tarbell who exposed many scandals and wrongdoings of Rockefeller's Standard Oil Company.