What is hyperpluralism?

I generally agree with the first answer, but I would take issue with a couple of the ideas in that answer.

First of all, pluralism does not argue that you need groups working with goals that are common to all of them.  Pluralism envisions many different groups with different goals, all competing to influence policy.

Second, hyperpluralism (which I connect in my mind with Theodore Lowi's idea of interest group liberalism) does not argue that too many groups suppress the power of government.  Instead, they expand the scope of government because government is trying to do more things so as to please more people.  It is very much like the system we have now where the government has become huge and tends to work for the interest groups and not the common good.

So hyperpluralism says that too many interest groups mean that government is doing too much for too many groups and so we have an excessively large government.