Interest groups generate a great deal of controversy. Some critics even blame
                interest groups for many of the problems in America. Other people, however, see
                interest groups as a vital component of the American democratic system.
Pluralism 
Pluralism is the idea that democratic politics consists of
                    various interest groups working against each other, balancing one another out so
                    that the common good is achieved. President James Madison first put forth this
                    idea in an essay called Federalist Paper No. 10 (1787), which
                    urged New Yorkers to ratify the Constitution. According to Madison, competing
                    interest groups are necessary to good government because they not only give
                    people a means of contributing to the democratic process but also prevent any
                    one minority from imposing its will on the majority. Interest groups therefore
                    are a vital party of a healthy democracy.
Flaws in Pluralism 
Critics of pluralism contend that there is no such thing as the common
                        good because there are so many conflicting interests in society: What is
                        good for one person is often bad for others. They argue that the interest
                        groups interfere with democracy because they seek benefits for a minority of
                        people rather than the greater good of the majority. The National Rifle
                        Association, for example, has repeatedly blocked new gun control legislation
                        despite the fact that a majority of Americans actually want stricter gun
                        laws. Other critics argue that the interest group system is really effective
                        only to economic interest groups, which have greater financial resources at
                        their disposal. Nearly two-thirds of lobbyists in Washington represent
                        economic groups. Critics also argue that interest groups tend to ignore the
                        interests of the poor in favor of middle- and upper-class Americans, who
                        have more time and money to contribute.
Hyperpluralism 
Other scholars have argued that interest groups have been too
                        successful and use the term hyperpluralism to describe
                        political systems that cater to interest groups and not the people. These
                        critics argue that too many interest groups lead to
                            demosclerosis, the inability of government to accomplish
                        anything substantial. These critics contend that the U.S. government cannot
                        make serious changes, even if those changes are needed, because competing
                        interest groups stymie the government from governing the country
                        effectively.