If you feel that ordinary working people should have the strongest political voice, you can say you believe in populism.
In politics, the term populism can have different meanings depending on who is using it and what their political goals are. At its root, populism is a belief in the power of regular people, and in their right to have control over their government rather than a small group of political insiders or a wealthy elite. The word populism comes from the Latin word for "people," populus.