The US Fed official overseeing payment systems said slowing down the speed at which payments are cleared and settled helps
He said unless new solutions are found, interlinking fast payment systems "might increase" the
Acknowledging that consumers and businesses want cheaper and faster cross-border payments, Waller expressed his reservations.
"I am not entirely convinced that interlinking arrangements will necessarily deliver," he said.
Delivering a lecture in India's tech capital Bengaluru on Monday, Das advocated a faster interlinking of domestic payment systems to overcome the concerns of high costs and delays.
"With the emergence of Fast Payment Systems across countries and experimentation around CBDC, new possibilities are opening up to bring in greater efficiency to cross-border payments. Maximum efficiency gains in such initiatives would come from ensuring inter-operability as a key design element," Das had said.
Waller, however, said that it may not be easier.
"There is no silver bullet that increases speed and efficiency without tradeoffs," he added.
He said certain frictions are built "purposely" into the
The professor of economics said legal, compliance and operational considerations will have to be looked at, along with governance, oversight, data privacy and settlement arrangements when thinking about interlinking.
He said the right incentives for the sender in a cross-border payment is essential, and also conceded that it exists in remittances.
However, these are very small value transactions, he said, wondering whether the senders need to be incentivised at all.
"We need to ask ourselves whether banks would find a central bank interlinking service more effective than their existing arrangements for cross-border payments, and if they would actually use it," Waller said.
He also made it clear that having strong domestic networks is a necessity before one can embark on interlinking and added that the US Fed's system will take two years to be ready.
The senior US Fed official also said the Silicon Valley Bank episode is behind, and the banking system in the world's largest economy is "fine" now.
"We had a banking crisis in March 2023, Fed reserve stepped in to set up a landing facility, and that has calmed down, and we were able to close that facility in March of this year. That's our confidence that everything in the banking system is fine," he told reporters.