How many people do you think could conceivably work in manufacturing? And who buys all those manufactured goods? The social problem isn’t solved by quotas.
India's data collection is much worse than China's but we can also look at other metrics like exports. India exports less in total value than a resource-starved, tiny nation like South Korea.
https://www.perplexity.ai/search/3aba98a3-cba1-49d8-bcb4-869...
Thus, India could at least add another 100 million manufacturing jobs, along with an additional 100 million service jobs to support manufacturing in logistics, trade, maintenance, customer support, insurance, and food service.
Given the structure of Indian constitution which gives very little power to local governments to raise revenue and build infrastructure, India is structurally limited as of now from ever becoming as developed as China, let alone western countries.
I see India becoming more like Brazil than China. That's not necessarily a bad thing since even Brazil is 4-5x richer in per capita than India.