Since India already has nuclear technology, they can use it to desalinate large amounts of ocean water. Nuclear energy is relatively easy to scale.
Producing good doctors, teachers, police officers, judges is much harder to scale. At the very least, India us known to nurture good engineers and doctors in serious numbers.
There are countries with large young populations that struggle to make a decent living due to a lack of investment or opportunities.[1][2]
1. https://en.wikipedia.org/wiki/Demographics_of_Egypt#Age_dist...
2. https://en.wikipedia.org/wiki/Demographics_of_India