Explanation:

Poverty and Un-British Rule in India
Dadabhai Naoroji’s book Poverty and Un-British Rule in India brought attention to the draining of India's wealth into Britain.
Dadabhai Naoroji's work focused on the drain of wealth from India into England during colonial rule of British in India. One of the reasons that the Drain theory is attributed to Naoroji is his decision to estimate the net national profit of India, and by extension, the effect that colonisation has on the country. Through his work with economics, Naoroji sought to prove that Britannia was draining money out of India. Naoroji described 6 factors which resulted in the external drain.
•Firstly, India is governed by a foreign government.
•Secondly, India does not attract immigrants which bring labour and capital for economic growth.
•Thirdly, India pays for Britain's civil administrations and occupational army.
•Fourthly, India bears the burden of empire building in and out of its borders.
•Fifthly, opening the country to free trade was actually a way to exploit India by offering highly paid jobs to foreign personnel.
•Lastly, the principal income-earners would buy outside of India or leave with the money as they were mostly foreign personnel.
In Naoroji's book 'Poverty' he estimated a 200–300 million pounds loss of India's revenue to Britain that is not returned. Naoroji described this as vampirism, with money being a metaphor for blood, which humanised India and attempted to show Britain's actions as monstrous in an attempt to garner sympathy for the nationalist movement.
Think!
•Economic critique of Colonial government
•R C Dutt