What was the two-fold motive behind the systematic de-industrialization effected by the British in pre-independent India?

British followed systematic de-industrialisation by destroying the handicraft industry. The primary motive behind deindustrialisation was twofold:

(i)                 To get raw material from India at cheap rate and to make India an exporter of raw material for British Industries

(ii)               To sell British manufactured goods in Indian Market at higher prices in this way they exploited India through the device of double taxation.