"... The total savings could be substantial: if the combination of direct cash transfer and Aadhaar eliminates the estimated 15 per cent leakage cited above for the programmes being integrated, savings could total 0.5 per cent of GDP in addition to the gains from the better targeting of spending on the poor," the IMF said in a report.
Direct cash transfers, which entail direct payments from the government to recipients, can bring down costs and diversion by phasing out middlemen and complex bureaucracies, it added.
"...But will involve many challenges: the timeframe for bringing India's population of 1.2 billion into the Aadhaar programme could extend beyond 2014, and integrating this database with information on individuals eligible for subsidised fuel will take time," it added.
As per the Unique Identification Authority of India, (UIDAI) which issues the Aadhaar numbers, about 320 million such cards have been issued so far. UIDAI has plans to issue 600 million Aadhaar cards by 2014.
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The Indian government has started transfering cash directly into the bank accounts of beneficiaries of selected schemes using the Aadhaar payment gateway in a phased manner. The first phase started in January covering 43 districts and 78 more would be brought covered from July 1.
Currently, India maintains large subsidy programmes for food, fertiliser and fuels. Subsidised food and kerosene are available from government-owned stores at below-market prices for eligible residents.
While all fertiliser sales are at subsidised prices, LPG cylinders are distributed directly, with a limit on each household's subsidised purchase.
Pilot programmes delivering subsidised kerosene using Aadhaar-based identification have been set up in Rajasthan.
A pilot scheme replacing subsidised LPG with direct cash transfers was also launched in Mysore, Karnataka.