Most Australians never pick a superannuation fund, never pick an investment option inside it, and barely look again after the first contributions land. The system is built to run on that inaction. Defaults are the operating rule, and behavioural economics has spent decades measuring what defaults do.
Defaults, loss aversion, present bias, and choice overload already appear elsewhere on this site. In superannuation they land at a scale few other domains hit: a compulsory system holding trillions of dollars, running for forty years, on decisions almost nobody actively makes. Aimed against a saver, those mechanisms compound for decades. Aimed for one, the same compounding works the other direction.
Four documented cases show how those tendencies have cost Australian retirement savers real money. One 2021 policy change then used the same default lever to stop the damage.
The story in four parts
From the first pay cheque, the fund and investment option that applied by default are usually the ones that compound for the next forty years.
During the 2020 crash, loss aversion moved real members into cash at the trough. Everyone who stayed invested recovered the paper loss; the sellers did not.
An early withdrawal solves a present problem. The compounding that withdrawal would have earned over forty years never shows up on the screen at the time.
A 2021 statute flipped the automatic outcome on job change from “open another account” to “keep the existing one,” using the identical default power that had multiplied accounts.
The evidence at a glance
The Productivity Commission found roughly a third of Australian super accounts were unintended duplicates, draining members of $2.6 billion a year in needless fees and insurance.
Across one 21-day stretch in 2020, tens of thousands of members at a single fund moved to cash while $34.2 billion was stripped from its value, freezing losses the market later recovered.
3.05 million Australians took retirement savings out early in the pandemic. Counted with the compounding those dollars would have earned, a modest early withdrawal costs far more than its face value.
From November 2021, an existing super account travels with a worker to a new job by default. Opening another unintended account stopped being the automatic path.
When a new employee leaves the fund blank, the law routes contributions into a MySuper product: a standardised default built for people who never choose. That design rule is why most super accounts run on autopilot from the first pay cheque; a literacy shortfall does not explain a pattern this consistent. The fund and investment option that applied by default are the ones that compound, or lag, for the next forty years.
Historically, each job start without a nomination opened another default account on top of whatever still sat from the last employer. The Productivity Commission's 2018 inquiry measured how far that pattern had gone. About a third of all Australian super accounts, roughly 10 million, were unintended duplicates. Each carried its own fees and, often, its own default insurance policy in the background.
How does simply not choosing twice end up costing a saver tens of thousands of dollars?
The Commission priced the leak at $2.6 billion a year: $1.9 billion in unnecessary insurance premiums and $690 million in excess administration fees. Some members holding several forgotten accounts, each with its own default life or disability cover, lost more than $50,000 from duplicate or unsuitable policies alone by the time balances were counted up.
What it teaches: almost nobody opens a second super account on purpose. The default opens one whenever a saver fails to name an existing fund, and the fees and insurance premiums on that account keep charging whether anyone remembers it exists.
In a market downturn a falling balance is still a paper figure. It crystallises only when someone sells at the trough instead of waiting for the recovery that historically follows. Loss aversion makes that sale feel like prudence: watching a loss widen, even briefly, hurts more than the larger long-run cost of locking it in.
March 2020 showed the pattern at scale as markets fell as much as 20% in a month. At AustralianSuper alone, 76,042 members switched their investment option in a 21-day window while the fund's own value fell by $34.2 billion. Across the system, the share of superannuation assets held in cash rose that month by more than the whole Global Financial Crisis produced.
Why does switching to cash feel safer, right at the exact moment it does the most damage?
Members who moved to cash near the March 2020 low froze whatever loss had already appeared, then sat out the rebound that arrived within months. One industry estimate put a $100,000 balance switched to cash at the trough roughly $50,000 worse off five years later than the same balance left alone.
What it teaches: a balance that has fallen on paper is still fully in the market for the recovery. Converting it to cash at the low point is the step that makes the loss permanent, and that is the step loss aversion makes feel responsible.
The same mechanism sits in this site's Loss Aversion and Risk Aversion entries, only here at a scale most other choices never reach. The Risk Aversion write-up puts it directly: a saver who avoids the market on a decades-long horizon “is applying a short-horizon risk judgment to a long-horizon decision.” A super balance is meant to be checked rarely and held for decades. A crash makes it feel like something that needs an immediate reply.
A dollar needed this month feels far more pressing than the same dollar missing in forty years, even when the maths favours waiting. Present bias is the tendency for an immediate, concrete need to beat a distant, abstract one every time. Superannuation frames that trade-off cleanly: money is either available now or compounding for decades.
The COVID-19 Early Release Scheme ran the trade-off at national scale. Between April and December 2020, the Australian Taxation Office approved 4.55 million applications from 3.05 million people, releasing $37.8 billion of superannuation early, most of it after a sudden loss of income. The scheme did what it was built to do for people in real hardship. It also showed, at a scale no lab study can match, how heavily an urgent present need outweighs a retirement outcome too far off to feel real yet.
Why does a withdrawal that solves this month's problem cost so much more than its own dollar value?
Every dollar taken out in someone's 20s, 30s, or 40s stops compounding from that day until retirement. What feels like a modest one-off adjustment today is that amount plus every year of investment growth it would have earned, gone from the final balance. The gap is easy to underweight in the moment because the cost is real, decades away, and easy to imagine fixing later.
What it teaches: real hardship and present-biased choices can sit in the same decision. The scheme met genuine need for millions of people. It still shows, at scale, how automatically a distant retirement balance loses to an urgent immediate one, the trade-off present bias predicts.
Each duplicate from the default problem above brings its own fee, and usually its own investment menu and default insurance as well. Optimising super then means several decisions instead of one. Choice overload often ends in no choice at all, which is how duplicate fees and unsuitable insurance keep running for years without anyone noticing.
When a choice does get made, the naive “1/n” heuristic shows up in retirement investing too. People split attention or money evenly across whatever options sit on the menu, without weighing what each option actually holds. This site's Diversification Heuristic entry already documents that pattern inside a defined-contribution retirement plan.
Each mechanism above depends on what happens automatically when nobody actively decides. That is why one well-placed default can fix a problem a thousand disclosures never would. The multiple-accounts mess is the clearest proof.
From 1 November 2021, the Treasury Laws Amendment (Your Future, Your Super) Act changed the path for a new employee who leaves the fund blank. Instead of opening a fresh default account at the new employer, an existing super account is now “stapled” to the worker and travels from job to job. The default that had been creating a third of Australia's super accounts by accident was redirected to stop creating them.
If defaults caused the problem, can the same lever undo it?
Stapling did not ask anyone to choose better, read a disclosure more carefully, or suddenly engage with their super. It changed the automatic outcome when nobody decides, from “open a new account” to “keep the one you already have.” The inertia behind the Productivity Commission's $2.6-billion-a-year finding is the same inertia the fix uses. The aim is simply reversed.
What it teaches: a default is always a design decision. The live question is which outcome it steers people toward.
The same logic already shows up elsewhere in super on purpose. Most MySuper products now use a lifecycle investment strategy that shifts a member's default allocation toward lower-risk assets as retirement approaches. Nobody has to notice the birthday or flip the switch. Australia's compulsory Superannuation Guarantee rate has also risen on a legislated schedule, from 9.5% toward 12%, lifting the whole population's savings rate without an individual opt-in. It is a compulsory rise rather than an opt-out nudge, yet the underlying idea matches this site's Smart Defaults entry on Thaler and Benartzi's Save More Tomorrow programme. Schedule the increase for later, and it never has to feel like a loss today.
None of the four patterns above require carelessness. They are what a system produces when almost nobody is prompted to look, which is why one deliberate half-hour check still pays for itself.