By Terry Ryder – April 2026

The first rule of public infrastructure should be simple: if taxpayers are paying, taxpayers should know the real price.

That is why this latest development on Victoria’s Suburban Rail Loop should concern far more people than just transport watchers and Treasury boffins. The State Government led by Premier Jacinta Allan has rejected a push to release updated cost-benefit analysis on Suburban Rail Loop East, leaving Victorians stuck with a figure first put forward years ago while every serious observer knows the real number is almost certainly higher.

A lot higher.

And that takes us straight back to the point made in the previous article I wrote on the blowouts hitting major infrastructure projects across Australia. Cost overruns are no longer an occasional mishap. They are becoming the business model. Projects are announced with one number, sold politically on that number, and then protected from scrutiny once reality starts catching up.

The public gets the ribbon-cutting rhetoric.

The taxpayer gets the bill.

In this case, the official price tag for the first stage of the Suburban Rail Loop, from Cheltenham to Box Hill, remains $34.5 billion. That figure was unveiled in 2021. Since then, construction costs have risen, inflation has bitten, labour pressures have intensified and land acquisition costs have hardly been moving backwards. Yet despite all of that, the Victorian government is refusing to publish fresh analysis and is instead pointing back to the original business and investment case as though nothing material has changed.

That is not transparency.

That is ducking the question.

The article notes that independent analysis has suggested the first stage is likely to exceed the earlier estimate, while the first two stages, from Cheltenham to Melbourne Airport, could cost more than $200 billion to build and operate over 50 years. The Parliamentary Budget Office revealed in 2024 that projected costs for those stages had already risen by $16 billion, and that was before adding further unexpected costs such as inflation, fuel spikes and land acquisition pressures.

So let’s be clear about what is happening here.

The government is not saying costs have not risen.

It is refusing to show the public the latest workings.

That distinction matters. Because once a government stops updating the public on the real price of a mega-project, trust starts to evaporate. People are entitled to ask whether the business case still stacks up. They are entitled to ask whether alternative projects would deliver a better return. They are entitled to ask whether the benefits being promised still justify the cost being concealed.

And if those questions make governments uncomfortable, that is not a flaw in democracy. That is democracy doing its job.

This is where infrastructure politics in Australia keeps going wrong. Big projects are sold as legacy-defining nation-building exercises. The language is always grand. “Vision”. “Transformation”. “Productivity”. “City-shaping”. But once the hard numbers start drifting, the vocabulary changes. Suddenly transparency becomes optional. Updated analysis becomes unnecessary. Scrutiny becomes negativity. Dissent becomes heresy.

The villain here is not infrastructure itself. Australia needs major transport projects. Growing cities need long-term planning. Congestion is real. Better connections matter. But the mechanism that keeps producing these blowouts is now painfully familiar: understate the cost upfront, overstate the certainty, lock in the politics, then bury the revisions for as long as possible.

That is how trust is destroyed.

And it is how bad investment decisions survive longer than they should.

The government’s defence, according to this report, is that the original business and investment case already outlines the strategic rationale and the long-term benefits of the loop. Fine. But a strategic rationale is not a substitute for updated arithmetic. The whole point of a cost-benefit analysis is that both sides of the equation matter. If the cost side has shifted materially, then pretending the original document still does the job is little more than bureaucratic camouflage.

There is another red flag in this story too: the funding mechanism.

The government is pointing to “value capture” measures including land tax, windfall gains taxes, developer contributions and carparking levies to help fund the project. Existing land and windfall taxes are expected to deliver almost $6 billion over 40 years. Additional charges are forecast to take total value capture revenue to about $11.5 billion by the mid-2060s.

Read that again.

A project with a 2021 first-stage estimate of $34.5 billion is being partly justified by revenue streams stretched over four decades. That does not scream financial strength. It screams fiscal strain. When governments have to reach decades into the future to make the funding story look credible, it tells you the project is leaning heavily on hope.

And hope is not a financing strategy.

Nor is secrecy a substitute for discipline.

The most troubling part of all this is that contracts are now far enough advanced that the project will almost certainly proceed in some form, regardless of whether it remains economically sound. That is another pattern we have seen before. Once governments move far enough down the track, the argument shifts from “Is this the best use of money?” to “It would cost too much to stop now.”

That is how sunk-cost thinking traps taxpayers.

It also explains why honest cost disclosure matters early, not late. Once the machinery is in motion, the leverage disappears. The public is left not with a genuine choice, but with a fait accompli.

The previous piece on national infrastructure blowouts made the broader point that Australia has become too comfortable with these runaway budgets. This latest Suburban Rail Loop episode is the Victorian version of the same disease. Announce big. Disclose little. Keep the old headline number alive for as long as possible. Push the real reckoning into the future.

But the future always arrives.

Victorians are not asking for sabotage. They are asking for numbers. Real numbers. Current numbers. Numbers that reflect the world as it is, not as it was when the sales pitch was written.

If the Suburban Rail Loop still stacks up, publish the analysis.

If it does not, taxpayers deserve to know that too.

Because infrastructure without transparency is not vision.

It is a blank cheque.