Even though the concept is great It is primarily done to appeal to masses below or just above the poverty line. This is a political agenda by present ruling government (Congress) in the state(Karnataka). It is named after late Ms Indira Gandhi who was president of Congress. Sorry to say India runs behind these votebank politics. Idea is that People will remember this as Congress providing food, even though it is being paid by tax payers money, So those corrupt power hungry monsters can continue to stay in power. The chief Minister who initiated Indira Canteen Karnataka spent 100K $ on his and his family for Tea and Snacks alone in the last 4 years. (https://www.newskarnataka.com/index.php/bangalore/snack-bill...)
Now you cant help but question the motive. And It is not the first time, These initiatives have been done in the past in India Eg: in another state called Tamil Nadu. It was called Amma canteen.