Obviously most of the chapter is intended to spark pity and a sense of sympathy for the poor, suffering farm animals, but the old Major's words are very telling. Remove Man from the scene, and the root cause of hunger and overwork is abolished for ever.
Man is the only creature that consumes without producing.
He does not give milk, he does not lay eggs, he is too weak to pull the plough, he cannot run fast enough to catch rabbits. Yet he is lord of all the animals. The speech, as intended, is very inspiring and encouraging to the tired, troubled farm animals. They even sing the words to old Major's dream five times in succession before Mr. Jones blasts the side of the barn with a shotgun. Unfortunately for the animals, the old Major's naivety is not revealed.