Public-Debt Sustainability

What this driver is

Public-debt sustainability is the continuing capacity of a sovereign (and, neighbouring, of sub-sovereign LGFVs) to service and roll debt without a standstill, a coercive restructuring, or a hidden-debt surprise. It is a meter, not a unique debt-to-GDP integer stored as size. Contested ratios require a named IMF DSA, World Bank IDS, or finance-ministry table.

The driver is not belt-road-debt-stress. It is not china-property-crisis, which is onshore developers and LGFV-land. LGFV rollover stress dual-homes here as a fiscal observation. They do not replace it. It is not hung on territorial-revisionism (1918–45). It is not ukraine-war, though 2022 energy and rate shocks are neighbours.

The attached time series uses Central government debt, total (% of GDP) (GC.DOD.TOTL.GD.ZS) as a disclosed inverted proxy: a higher raw debt ratio is treated as less sustainability. A debt-ratio series is not a Common Framework committee and not an LGFV rollover. Readers should treat it as lineage, not as a unique later crisis coefficient.

Mechanism

Sustainability moves through named channels.

First, primary balance and rates. This page does not invent a unique r-g integer.

Second, currency and external. FX-denominated coupons force import compression when reserves fall. Sri Lanka’s 12 April 2022 interim policy is the dated illustration, already on belt-road-debt-stress. Dual-home.

Third, hidden and sub-sovereign. LGFVs, SOE guarantees, and collateralised bilateral loans can sit off the central-government book that GC.DOD.TOTL.GD.ZS sees. That is why the proxy is weak for China and for BRI. china-property-crisis is the onshore neighbour.

Fourth, restructuring architecture. G20 Common Framework (November 2020) is the official bilateral treatment track.

Fifth, household incidence. Austerity after a standstill hits fuel, medicine, and transfers. Criticism-first: sustainability restored on a spreadsheet can still be a queue at a pump. This page does not invent a unique later poverty integer.

Timing is a coupon day, a DSA vintage, and years of rollover. A later genuine comparable-treatment agreement is a new fact.

Evidence base

The live proxy is World Bank GC.DOD.TOTL.GD.ZS (https://api.worldbank.org/v2/country/all/indicator/GC.DOD.TOTL.GD.ZS?date=2020:2025&format=json&per_page=20000 (opens in a new tab)). Sri Lanka Ministry of Finance interim policy, 12 April 2022. IMF DSAs. World Bank International Debt Statistics. G20 Common Framework, November 2020.

Evidence is strongest for a named standstill and for the existence of a debt-ratio series. It is weaker for the claim that GC.DOD.TOTL.GD.ZS captures LGFVs or BRI collateral. It is weakest where a unique later default-count is invented as size.

Effect on welfare indicators

This meter, when it actually fails, is a first-order channel into import compression and a second-order channel into household prices.

• Global consumer price inflation: direction higher in a defaulting importer when FX is rationed onto fuel and food. Horizon: months to a couple of years. Confidence: medium for that channel; low as a unique global CPI coefficient. The indicator is lower-is-better, so that channel is a negative welfare direction.

A death path does not follow from a DSA. Missing coefficients stay missing.

The welfare sign of a completed standstill on debtor households is negative. A later completed rail opening does not rebate the standstill.

Interactions and contested points

Reinforcement is a hike and a standstill in the same year. Offsetting is an IMF disbursement.

The strongest competing view is that the inverted debt-ratio proxy is too remote, especially where hidden debt dominates. That objection is serious. The competing defence is only this: the node already exists, the proxy is disclosed and inverted, and an honest description is better than a template that pretends a central-government ratio is sustainability.

It does not. Names without a public-complete dossier stay plain text.

Established: GC.DOD.TOTL.GD.ZS as disclosed inverted proxy; Sri Lanka 12 April 2022 dual-homes to the BRI event bundle; LGFV stress dual-homes to the China property event bundle. Not established: a unique debt-to-GDP or haircut integer as size. It would not rename this meter as a technician success.