The outgoing Reserve Bank chief also rejected the argument that inflation has come down largely because of "good luck" stemming from low oil prices and not because of RBI's monetary policy measures, saying a significant part of decline in global prices has not been passed on domestically as the government has hiked excise on petrol and diesel.
He also appeared to blame "over-leveraged promoters" for voices against the clean-up at banks and said "some public sector bank CEOs with a short remaining tenure would prefer not taking stern action and recognizing NPAs" as they might "prefer transferring any problems to their successor".
He also said that investors in bank shares do not welcome disclosures of loan losses initially, while "depositors, knowing the government stands fully behind PSU banks, are rightly unperturbed by the quality of bank balance sheets".
"Without any political push back as inflation rises, it is necessary to build institutions to ensure macroeconomic stability...Perhaps this is why successive governments, in their wisdom, have given the RBI a measure of independence," said Rajan, who will return to academics when his three-year term ends on September 4.
Hitting back at the critics who have blamed him for keeping rates too high and thus killing demand and growth while failing to even control inflation, Rajan said, "Critics offer two contradictory arguments on inflation".
"On the other, they argue that our policy has had little effect on curbing inflation, that disinflation has been a result of the fall in oil and other commodity prices."
Rejecting these arguments, the former IMF Chief Economist said in a lecture here that the disinflation process started in late 2013, long before oil prices collapsed.
"Moreover, a significant part of the fall in oil prices globally has not been passed on domestically, as the government has hiked excise on petrol and diesel, and refinery margins have also waxed and waned.
He further said the criticism of the central bank with arguments unsupported by evidence happens outside India too.
Giving examples of the UK and US among other places, Rajan said, "Criticism comes with the territory, and central banks need to make the case for their policies.
Addressing the 10th Statistics Day Conference at the RBI
Talking about India, he said, "The press is constantly urged to frame the debate as inflation versus growth, and with inflation still moderate, only the excessively conservative central bank could be against growth!"
Citing past trends, he also warned of a crisis scenario if inflation is not contained.
"As we have seen in India's own past, and in other emerging markets, moderately high inflation tends quickly to become very high inflation. The currency then becomes volatile, leading occasionally to external stress. After all, one of the reasons we were termed the Fragile Five in the summer of 2013 was because of our high inflation.
"However, the belief that there is a strong powerful domestic constituency against inflation in India, which was drummed into our heads as students, may be a myth, certainly at moderately high levels of inflation. Without any political push back as inflation rises, what is to ensure macroeconomic stability?" he wondered.
"So it is better that we tackle inflation up front by building the necessary institutions. Perhaps this is why successive governments, in their wisdom, have given the RBI a measure of independence.
"Certainly, such concerns would support the current government's decision to enshrine its commitment to low inflation through a formal inflation target and the creation of a monetary policy committee," he added.
It can be recalled Rajan faced attacks from a section of ruling BJP - notable among them Rajya Sabha MP Subramanian Swamy - for the way he has kept interested rates, which they alleged "killed" the domestic industry, especially the SMEs.
Amid all this, Rajan on June 18 announced he would not opt for a second term and return to academics.
In his lecture today, Rajan admitted the Reserve Bank should have acted against loan defaulters earlier by pushing for a clean-up as is being done now.
"As with inflation, it was the duty of the Central bank to press for bank clean-up earlier," he said.
He said there is a belief in some quarters that the RBI has hurt economic growth by keeping interest rates and borrowing costs too high and that high rates have reduced credit and spending but had little effect on inflation.
Asserting that RBI stands by its policies, Rajan presented some charts to support the rationale for the central bank's actions and to show that "monetary policy has not been too tight".
"Instead, I will argue that the slowdown in credit growth has been largely because of stress in the public sector banks, stemming from past mistakes in lending. This will not be fixed just by a cut in policy rates. Instead, what is required is a clean-up of the balance sheets of public sector banks, which is underway and needs to be taken to its logical conclusion," he said.
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