According to the theory of biased pluralism, which group has disproportionate influence in the formation of public policy?

The rich/elites / the wealthy.

Explanation:

In Pluralism Political Theory is a theory which support that some bodies that are non-governmental influence the government and political process, although the government can make decision.

The rich people have disproportionate influence in the formation of public policy. The rich because of their money can influence Political position. For example, the activist; El-Hajj Malik El-Shabazz, popularly known as Malcom X was not 'that' rich but was supported by the wealthy groups before he got his ministerial position.