An employee serves customers inside a branch of Gramin Bank of Aryavat (GBA), sponsored by Bank of India, in the village of Khurana, Uttar Pradesh, India, on Monday, April 13, 2015.

India's Prime Minister Narendra Modi has received some flak in recent months for his failure to push through crucial reforms. Reducing the country's unbanked may be one of his biggest achievements yet.

More than 180 million people in India entered the financial mainstream last year after Modi's mega financial inclusion initiative Pradhan Mantri Jan-Dhan Yojana (PMJDY) - Prime Minister's People's Wealth Scheme - was launched last August.