"What is necessary"

In Gregory David Robert’s novel “Shantaram”, the protagonist Lin comes to India from Australia and is overwhelmed (emphasis added):

Now, long years and many journeys after that first ride on a crowded rural train, I know that the scrambled fighting and courteous deference were both expressions of the one philosophy: the doctrine of necessity. The amount of force and violence necessary to board the train, for example, was no less and no more than the amount of politeness and consideration necessary to ensure that the cramped journey was as pleasant as possible afterwards. What is necessary! That was the unspoken but implied and unavoidable question everywhere in India. When I understood that, a great many of the characteristically perplexing aspects of public life became comprehensible: from the acceptance of sprawling slums by city authorities, to the freedom that cows had to roam at random in the midst of traffic; from the toleration of beggars on the streets, to the concatenate complexity of the bureaucracies; and from the gorgeous, unashamed escapism of Bollywood movies, to the accommodation of hundreds of thousands of refugees from Tibet, Iran, Afghanistan, Africa, and Bangladesh, in a country that was already too crowded with sorrows and needs of its own. The real hypocrisy, I came to realise, was in the eyes and minds and criticisms of those who came from lands of plenty, where noone had to fight for a seat on a train.

This reminds me of people from rich countries talking about the smiling people you they in “mud villages” and how that must mean that development aid is unneccessary or harmful. No, a higher degree of social harmony is just what is necessary.