@AOG
The author will have to do lots of arm-waving about this, then.
https://en.m.wikipedia.org/wiki/Great_Famine_of_1876%E2%80%9378
5.5 million dead. Grain *exported* to England in the midst of it all. Cotton, indigo plants and tea are all inedible and taking edible crops would be treated as theft of the Empire's goods. This is why people moan about Imperialism.
The author focuses on the 20,000-odd miles of railways built from 1840 onward but seems to forget that these were originally built to move cargo. People worked within walking distance of home and had no need of commuting. If your cotton fields are a long way from a decent port, you need something cheaper than hundreds of horse-and-cart folk, demanding payment. Railways were not built to benefit the population but to benefit the Empire.
So, in short, we might have arrived there too late to loot it but we didn't half farm the place.