A former wealth manager turned economist says Australia now ticks every box for what economists call a “rentier black hole”: the point where a nation’s money pours into owning property rather than into productive work. Here is what the term means, and why he says we are heading down Britain’s path.
The warning comes from Henry Fudge, a former wealth manager and economist based in Switzerland, who has been documenting the UK’s version of the problem on his Substack. In a video posted to TikTok he turned the lens on Australia, and his verdict was blunt: the country fits the diagnosis “perfectly”.
The idea of a “rentier black hole” is not originally his. It describes an economy where the rewards flow to the owners of existing assets, land and property above all, rather than to the people building, inventing and working. Money that could fund businesses and wages instead chases the same finite housing stock and bids up its price. The British academic Brett Christophers wrote a book on the modern form of it, “Rentier Capitalism“. Fudge’s “black hole” is his own label for where it leads.
Australian dwelling values have more than tripled since 2000. Rents have climbed too, up more than 20 per cent since the pandemic on the ABS measure.
The common explanation is immigration. Fudge says Australia ran the perfect test of that theory itself. During COVID the borders shut and net overseas migration turned negative for the first time since 1945-46. House prices did not fall. They rose more than 20 per cent in 2021, the fastest pace in more than three decades.
So if not migration, then what? Fudge breaks his diagnosis into three letters: E, C and T.
E for elasticity
Elasticity of supply is how quickly new housing gets built when prices rise. On the OECD’s long-run measure, Australia looks more responsive than the UK, which on paper would suggest the healthier market.
Fudge calls that a measurement artefact. Australia is a big country, and the national figure is flattered by cheap land on the fringes and in the regions, where building is easy. Put two million homes in the outback that nobody wants and the national number improves, even if not a single new apartment goes up in Sydney. In the coastal cities where people actually want to live, he argues, supply is about as stuck as Britain’s.
C for collateral
The second letter is credit. Around 60 per cent of Australian banks’ loan books is housing, on the Reserve Bank’s figures, a concentration close to the UK’s.
On top of that sit the deposit schemes. First-home buyers can get in with a 5 per cent deposit under the First Home Guarantee, and single parents with 2 per cent under the Family Home Guarantee. A separate shared-equity scheme, named Help to Buy after the British original, began in December 2025. Fudge’s point, the same one made about the UK’s Help to Buy, is that in the places people want to live, cheaper access to credit does not build new homes. It lifts prices.
T for tax
The third letter is where Fudge says Australia is “basically mental”. Two settings do the work.
Negative gearing lets an investor who makes a loss on a rental property, once mortgage interest and upkeep are counted, deduct that loss against their other income. At the top marginal rate of 45 per cent, a $25,000 rental loss is worth about $11,250 back from the tax office. The second setting is the capital gains tax discount: hold an asset for more than a year and half the gain is tax-free.
The bill for that discount is large. Treasury’s own tax expenditures statement puts it at about $21.8 billion a year, and the Parliamentary Budget Office finds 82 per cent of the benefit goes to the top 10 per cent of earners.
One point in Fudge’s account needs updating. He says Australia “recently just repealed” negative gearing. That overstates it. What Parliament has passed restricts negative gearing to newly built homes from 1 July 2027, with existing investors grandfathered, and replaces the 50 per cent capital gains discount with indexation plus a 30 per cent minimum tax rate from the same date. The current settings hold until then. Fudge’s broader point survives the update: grandfathered and limited to new builds, the change would not unwind the incentive on its own.
Why it bites
The result shows up in the affordability numbers (as we’ve seen locally). On the Demographia survey, the national median house costs about 8.2 times median income. Sydney sits at 13.8 times household income, the second least affordable city in the world behind Hong Kong.
Cotality’s figures show a new mortgage now takes 45 per cent of median household income to service, and 11 years to save the deposit. More than two-thirds of the average household’s wealth, around 67 per cent, is tied up in land and dwellings, on ABS data.
When two-thirds of a nation’s wealth sits in property rather than in productive work, Fudge says, you get the signature of a rentier economy: a widening gap between measured productivity and real wages, with GDP held up by imputed rent and the churn of housing transactions around it.
It is why, he argues, households feel they are running faster to stand still.
His read on where it ends is the UK, which he has charted in detail on his Substack. Without a structural fix, he says, Australia is “going to end up basically like the UK with slightly better weather and slightly more crocodiles”.
Henry Fudge made these comments in a video posted to TikTok and writes about the “rentier black hole” at his Substack.
