The British had changed the entire economic structure of India.
1. Introduction of the new land revenue system which allowed the government to confiscate land and accept revenue in cash caused and suffering to the Indian peasants.
2. Due to Industrial Revolution markets were flooded with machine made goods. Indian Industries could not compete with them and thus declined.
3. When an Indian state was annexed, the administration was replaced by the company. This created unemployment and caused resentment.
