Giving a lecture at an award ceremony at MIT Sloan on Tuesday (Dec 9), Mr Tharman cautioned against the “systemic risk” present when multiple advanced economies accumulate “higher and higher debts because the markets give them the leeway to do so”.
He said this will lead to “systemic risk”, that is, “a risk of global financial instability, because we know it can’t last indefinitely,” he added, noting that private companies that lend to governments are also often highly leveraged.
“No one knows exactly where the limits will be, but it is clear that the debts cannot keep rising indefinitely without creating significant risks of financial instability,” he said.
Even if it does not end in “a sudden collapse” of confidence in the system, it is “reasonable to assume” that ever-increasing debts as a percentage of GDP will lead to an erosion of long-term growth and a gradual loss of trust in reserve currencies. Even if this does not trigger a major crisis, this will pose chronic global financial instability, Mr Tharman added.
The largest challenges have yet to come, he said, noting the costs associated with ageing societies and climate change, as well as more advanced economies spending more on defence due to geopolitical fracturing and increased conflicts.
The closest historical precedent to this situation is the period after World War II, when most of the advanced countries apart from the United States started with very high debt-to-GDP ratios, but the solutions they adopted then are no longer feasible today, said Mr Tharman.
There is no realistic solution to putting government debts back on a sustainable track without adjustments to taxes and spending, he added, noting that both are “very likely”.
“This should not be simply a call for fiscal austerity. The challenge is to make these adjustments while repurposing fiscal policy more fundamentally: so that people can see that the adjustments are fairly distributed across society, can see the value in government spending that their taxes support, and so that the adjustments do not permanently reduce growth,” he said.
“Because a sustained reduction in growth will make any form of social solidarity very difficult to achieve.”
REPURPOSING FISCAL POLICY
Mr Tharman highlighted three “reorientations” needed in this repurposing of fiscal policy, which will make them more sustainable while addressing the needs of the poor and the middle class.





