Burying the NPT for now, consider what Wikipedia (as of 9am 2 Oct) says about the economic considersations:
the U.S. ...expects that [the] deal could spur India's economic growth and bring in $150 billion in the next decade for nuclear power plants, of which the U.S. wants a share. It is India's stated objective to increase the production of nuclear power generation from its present capacity of 4,000 MWe to 20,000 MWe in the next decade. However,... Dalberg, [a consultancy which] advises the IMF and the World Bank...[concludes] that for the next 20 years such investments are likely to be far less valuable economically or environmentally than a variety of other measures to increase electricity production in India. They have noted that U.S. nuclear vendors cannot sell any reactors to India unless and until India caps third party liabilities or establishes a credible liability pool to protect U.S. firms from being sued in the case of an accident or a terrorist act of sabotage against nuclear plants.