Answer:
Pyramids, monopolies and national socio-economic powers.
Explanation:
Farmers and peasants, although they are the primary producers of agricultural products, do not get all the profits, since in most countries, the real beneficiaries of these productions are the traders, suppliers and contractors of these people. The prestigious companies and corporations are the ones who really profit (i.e. supermarkets, stores, governors and transporters), since in their terms and conditions, they take advantage of the farmers, and they, having only the option of accepting to sell, continue in the same cycle.
Without the transporters or companies, the farmers would not sell anything, so in order to do so, they accept conditions that benefit others, but not themselves. In society, the rich are not those who work the hardest, or those who contribute the most, but those who work the smartest. (whether it is illegal or not)