Facts don't match with your logic.
He wanted indian army to fight his war in which we lost million soldiers if they will not provide food to them how they will fight for their interests they can do anything that's what they did.
People in civil service were required to run the empire who would have managed the resources which were going to London when war was going on During the war, India provided 196.7 million tonnes of coal, 6 million tonnes of iron ore and 1.12 million tonnes of steel. The Oxford Encyclopedia of Economic History, Volume 2, says: “35 per cent of India’s annual cotton textile production, amounting to about 5,000,000,000 yards, went into creating war material.”
Timber was a major war input and its export led to large-scale destruction of India’s extensive forests. The Energy and Resources Institute says, “During World War I, forest resources were severely depleted as large quantities of timber were removed to build ships and railway sleepers and to pay for Britain’s war efforts…World War II made even greater demand on the forest than World War I had done.”
So starving of 3 Million people is not enough to show a person's negativity towards a country cool
.
Other state's like punjab already have fertile land so it's particularly difficult to cause a famine their.