A new independent inquiry into the AUKUS submarine pact is set to begin after former Labor minister Peter Garrett was chosen to lead a community-based investigation into one of the most expensive and controversial defence projects in Australian history.

The inquiry will run for several months before delivering its findings later this year.

Supporters say it is a necessary step toward transparency.

Critics of the process argue major questions surrounding cost, sovereignty and long-term national security have never been properly examined in public.

And that is where the political significance of the inquiry rapidly expands.

Because the biggest question may no longer be whether AUKUS proceeds.

It may be whether Australians still trust the assumptions behind it.

A new inquiry led by former Labor minister Peter Garrett has reignited debate about defence spending, national sovereignty and public scrutiny of the AUKUS submarine program.

The inquiry was announced amid growing concerns surrounding Australia’s commitment to the AUKUS partnership, the multi-decade defence agreement involving Australia, the United States and the United Kingdom.

The project is expected to cost hundreds of billions of dollars over coming decades.

It remains one of the largest public spending commitments ever undertaken by an Australian government.

That scale alone guarantees political scrutiny.

But recent developments have intensified the debate.

Questions have been raised about submarine delivery timelines.

Questions have been raised about costs.

Questions have been raised about long-term operational control and strategic dependence.

Those concerns have not come only from political opponents.

They have increasingly emerged from within Labor circles as well.

The inquiry will reportedly examine issues including sovereignty, defence capability, nuclear waste management, environmental impacts and Australia’s long-term strategic interests.

Public hearings and written submissions are expected to form part of the process. :contentReference[oaicite:0]{index=0}

For supporters of the inquiry, the issue is straightforward.

If taxpayers are funding one of the largest defence projects in Australian history, they argue the public deserves deeper scrutiny.

That argument has become increasingly visible as details surrounding the submarine program continue evolving.

Recent announcements confirmed Australia is now expected to receive second-hand Virginia-class submarines rather than the earlier expectation that at least one new submarine would be included as part of the arrangement. :contentReference[oaicite:1]{index=1}

That shift changed the political conversation.

Because public trust is often built around expectations.

When expectations change, questions follow.

People begin asking whether the project they were originally told about is still the project being delivered.

That concern sits at the centre of the growing debate.

The issue is no longer only about submarines.

It is about confidence.

Confidence in long-term planning.

Confidence in government decision-making.

And confidence that the final outcome will justify the enormous financial commitment attached to it.

Those concerns become even more powerful during periods of economic pressure.

Australians continue facing housing affordability challenges.

Cost-of-living pressures remain significant.

Government spending decisions now attract far greater public scrutiny than they may have a decade ago.

People increasingly ask a simple question.

Is this the best use of taxpayer money?

That question helps explain why defence spending debates often become emotionally charged.

Because people are not only evaluating military capability.

They are evaluating priorities.

Supporters of AUKUS argue the strategic environment has fundamentally changed.

They point to growing tensions across the Indo-Pacific region and argue Australia requires advanced defence capabilities to protect national interests in an increasingly uncertain world.

From that perspective, the cost of failing to prepare could be far greater than the cost of the program itself.

Critics focus on different risks.

They question whether Australia could become too dependent on foreign military systems.

They question whether delivery schedules remain realistic.

They question whether future governments may inherit enormous costs without guaranteed outcomes.

Those competing arguments are now shaping public discussion.

And that is why the Garrett inquiry may attract attention far beyond traditional defence circles.

The debate connects directly to larger concerns already present across Australian society.

Trust.

Accountability.

Transparency.

Value for money.

Sovereignty.

Each sits beneath the surface of the AUKUS discussion.

That is also why the inquiry arrives at a politically sensitive moment.

Internal disagreements over the submarine pact are becoming more visible.

Several current and former Labor figures have publicly questioned aspects of the arrangement, creating unusual pressure within a government that continues officially supporting the project. :contentReference[oaicite:2]{index=2}

That growing division matters.

Because major national projects often depend as much on public confidence as technical planning.

Once confidence begins weakening, scrutiny intensifies.

Every delay attracts attention.

Every cost increase attracts attention.

Every policy adjustment attracts attention.

The inquiry is unlikely to determine the future of AUKUS by itself.

But it may influence something equally important.

Public perception.

Because the larger debate is no longer simply about nuclear submarines.

It is about whether Australians feel they are receiving clear answers about a project that will shape defence policy, government spending and national strategy for decades.

That may ultimately become the most important question of all.

Not whether AUKUS is expensive.

Most people already know that.

But whether Australians believe the benefits, risks and trade-offs are being explained openly enough for the public to make an informed judgment.

Because once trust becomes part of the debate, the argument stops being only about defence.

It becomes a debate about accountability itself.