Citing example of the telecom sector, Sharma said mechanism can be worked out to ensure that small payments are financially sustainable.
"There are three things which are extremely important for digital transactions to become ubiquitous - cost, convenience and confidence. India is an extremely cost-sensitive market...You can't have Rs 5 commission on Rs 100 transaction. That is not going to work," Sharma said speaking at a seminar on 'Demonetisation to Digital Remonetisation' organised by FICCI.
"My view is that not only in the short run, in the longer run too, if the work done principle is adopted in digital transactions, this whole merchant discount rate (MDR) and other issues will go away. I am not saying that they (banks) should stop earning any money but if they earn money they should earn money in a reasonable manner," Sharma said.
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"That thing has to go in the long run, if we want cashless to continue...Otherwise there is a danger than once these incentives end, people will revert back to cash, which should not happen. India has to become cashless," he said.
"I think there is a need to reduce these MDR and other digital charges..." Sharma said.
Asked about Vodafone's move to challenge in court TRAI's Rs 1050 crore penalty recommendation for denial of interconnectivity to newcomer Reliance Jio, Sharma declined to comment on the matter.
Vodafone last week told the Delhi High Court that the TRAI's recommendation to the Centre to impose Rs 1050 crore penalty on it for not giving interconnectivity to Reliance Jio was an "arbitrary" decision.
TRAI had recommended imposition of a fine of Rs 50 crore for each of the 21 circles of Vodafone, except in Jammu and Kashmir, coming to a total of Rs 1050 crore.