Which committee mooted the idea of payments banks?

The Nachiket Mor Committee mooted the idea of a Payments Bank. This Committee was set up in 2013. This Committee was also known as the Committee on Comprehensive Financial Services for Small Business and Low Income Households. You can read about the Payment Banks- History & Regulations (UPSC Notes) in the given link.

Further readings:

1. RBI – Reserve Bank of India [UPSC Indian Economy Notes]
2. Bad Banks – Idea Proposed by Indian Banking Association (IBA) Due to COVID-19