So Kṛṣṇa is teaching in this Fourth Chapter how to work. Yadṛcchā-lābha. Don't be greedy, so "This man is millionaire, so I have to become a millionaire." Competition. That is material disease. Now there is competition in between the capitalist and the communist. Now the communist or the laborer class men, they are thinking that "Why the capitalist should gain? We must gain. The industry is being conducted by us. The profits shall be divided between us. Why to the capitalist?" So that is not the solution. That is from frying pan to the fire.
Either the world is run on the principle of communistic philosophy or capitalistic philosophy, it will never be happy. Here is the formula, that everyone should be satisfied with the profit that he can easily make. That's all. Yadṛcchā-lābha. Not that everyone will have the same profit.
In material world everyone is working. Somebody is getting per hour thousands of rupees, and somebody is getting not even morsel of food. But still, one has to be satisfied. "Because one is getting thousands of rupees per hour, I will have to get also." No. Then you will never be happy. You be happy what you are gaining. Because everyone is making profit and losing according to his past karma. Pūrva-janmarjitaṁ dhanaṁ pūrva-janmarjitam vidyā, agre dhāvati dhāvati(?). This is the shastric injunction.
One man is trying with a little capital to do some business, and within few years he becomes very multi-millionaire. And one man is trying to elevate himself to a prosperous condition, but he cannot get even sufficient food. Why? Pūrva-janmarjitaṁ vidyā pūrva-janma.(?) One boy is passing examination, standing first-class. Another man, boy, is failing. Everyone is trying. Everyone should try his best, but he should be satisfied with the result which comes without any very much strain, yadṛcchā-lābha. Yadṛcchā-lābha-santuṣṭaḥ. That is lacking in the present civilization. Not only at the present moment, because Kṛṣṇa was speaking five thousand years ago. And before that, He spoke Bhagavad-gītā millions and trillions of years ago to the sun-god. This is the way of material civilization or material conditioned life, competition.