For nearly a decade, Australia’s defence community has warned that the country lacks the industrial depth required for deterrence, sustainment and prolonged operations. The 2016 Defence White Paper raised the concern. The 2020 Force Structure Plan reinforced it. The 2023 Defence Strategic Review (DSR) made it explicit: Australia must build a resilient, self-reliant industrial base capable of supporting advanced capabilities and absorbing shocks in a deteriorating strategic environment.

Despite this consistent diagnosis, the structural weakness remains. Australia still lacks the long‑term capital mechanisms needed to build and scale the industrial capacity that defence planners say is essential. The problem is not strategy but institutional architecture.

Establishing a government-backed Sovereign Development Fund (SDF) offers a structural solution, not as a financial instrument but as a national‑power instrument. It would be the capital engine needed to build the industrial depth that Defence has been calling for.

Deterrence is often framed in terms of equipment, posture and alliances. But it also depends on the ability to produce, repair, replenish and sustain. Industrial depth is what turns a defence force from a set of capabilities into a durable strategic asset.

For Australia, industrial depth means domestic manufacturing of critical components; redundancy in munitions, energy and critical materials; an ability to scale production in a crisis; a skilled industrial workforce with advanced tooling; and resilience against supply chain disruption.

The DSR was blunt, saying that Australia needed to ‘build a more robust, resilient and sovereign defence industrial base.’ But it also acknowledged that Defence couldn’t do this alone. The scale of investment required across energy, critical minerals, manufacturing, and advanced technologies extends beyond Defence procurement cycles.

Industrial depth is a whole‑of‑nation capability. And whole‑of‑nation capabilities require whole‑of‑nation capital.

Australia’s industrial weakness is not caused by a mismatch between private investment horizons and national strategic needs.

Private markets operate on short cycles and rapid returns. Defence capability requires long‑duration capital, tolerance for strategic (not purely commercial) risk, investment horizons measured in decades, and insulation from political and market volatility.

No private investor will build a domestically self-reliant missile‑component factory on a 25‑year horizon without a mechanism that shares risk and guarantees continuity. No bank will finance critical‑minerals processing that is strategically essential but commercially marginal. No private equity fund will invest in sovereign energy resilience when the payoff is national security rather than yield.

Australia’s strategic needs require patient, independent capital, which currently does not exist in any institutional form.

An SDF would fill this gap by providing a dedicated, long‑horizon capital pool designed to build national capability rather than maximise short‑term returns. Its purpose is not to replace private investment, but to anchor it – to de‑risk, co‑invest, and catalyse industrial capacity where strategic value exceeds commercial value.

An SDF would invest in Australian manufacturing for defence‑relevant industries, provide long‑term capital for critical minerals processing and energy security, support dual‑use technologies aligned with AUKUS Pillar Two, stabilise industrial investment cycles beyond political terms and create the redundancy required for mobilisation and sustainment.

In short, it would do what Defence cannot: build the industrial foundations of national power.

Defence procurement is designed to buy capability, not build industries. It cannot finance upstream supply chains, build domestic energy systems, underwrite critical minerals processing, develop dual‑use industrial ecosystems, or invest in long‑term industrial tooling and workforce development.

Yet all of these are prerequisites for the capabilities Defence wants to acquire and sustain.

AUKUS Pillar Two technologies such as autonomous systems, quantum, AI and undersea capabilities require in-country manufacturing ecosystems that do not yet exist. Materials and parts for munitions should be made in Australia, not imported. Sustainment of major equipment also requires domestic component manufacturing that private markets will not build without long‑term certainty. Energy resilience, essential for any modern military, requires capital‑intensive infrastructure outside Defence’s remit.

The SDF would be the connective tissue between Defence strategy and national industrial capability. It would align capital with strategy, building industries that Defence depends on but cannot fund, creating long‑term certainty for Australian manufacturing, and turning industrial depth from aspiration into national project.

Most importantly, it would give Defence planners what they have been asking for since 2016: a domestic industrial base capable of supporting Australia’s strategic weight.

If Australia is serious about deterrence, resilience and sovereign capability, industrial depth is foundational. And industrial depth cannot be built on short‑term capital, fragmented programs or ad‑hoc initiatives.

It requires a sovereign capital engine designed for long‑term national power, not quarterly returns.

The SDF would be that engine.

Australia has diagnosed the problem for a decade. The question now is whether it will build the institutional machinery required to solve it.