For some, pressure groups are a fundamental part of democracy. To others, pressure groups undermine the whole principle of democracy. Democracy is a system of government where decisions are arrived at by majoritarian principles with representatives elected at periodic elections where political equality and political freedom allow the voter an effective choice between competing candidates in a secret ballot.
In the pluralist model of democracy, pressure groups play an essential role. Political parties cannot provide adequate representation for the full range of diverse interests and opinions in a modern democracy because their key function is to aggregate interests into a coherent political entity capable of governing the country. Pressure groups enable particular interests and causes to be heard and to exert influence in public decision and decision-making. Yet it is precisely the representation of specialist interests and of single issues which may give