Why do we need political institutions

A democracy Works well when the political institutions, like the: Prime Minister and the Cabinet,: the Civil Servants, the Supreme Court, etc., perform functions assigned to them.
The need for these political institutions are
(i) To take decisions Countries need political institutions to take decisions regarding the welfare of the people. Institutions formulate various policies and welfare schemes.
(ii) To implement the decisions The decisions which have been taken care pf are to be implemented.
So, countries need institutions to implement the decisions.
(iii) To solve the disputes Institutions are needed to solve the disputes between various institutions.
(iv) To take right decisions Institutions are also needed to help the government to take the right decisions. They determine what is wrong, and what is right.