Proportional representation is NOT necessary in a country where

Proportional representation (PR) is designed to secure representation for all sections of society in proportion to their numbers, especially smaller groups and minorities [1]. Where a stable two‑party system has developed, political competition is largely concentrated between two broad blocs, reducing the problem of under‑representation of many small groups and diminishing the justificatory need for PR. Two‑party systems also tend to produce clear majorities or majority‑forming outcomes that PR systems often fragment, which is a key reason majoritarian systems are preferred for stability in parliamentary contexts [2]. Hence, PR is generally less necessary where a two‑party system already provides broad, majority‑forming representation.

Sources

1. [1] Indian Polity, M. Laxmikanth(7th ed.) > Chapter 23: Parliament > First-Past-The-Post System > p. 225
2. [2] Indian Constitution at Work, Political Science Class XI (NCERT 2025 ed.) > Chapter 3: ELECTION AND REPRESENTATION > Chapter 3: Election and Representation > p. 61