The idea that young Australians should be able to dip into their super to help buy their first home keeps going round and round. The most recent iteration put forward by the Coalitions Tim Wilson and a clutch of other backbenchers has the catchy sloganHome First, Super Second.

Wilson and co. are right in their diagnosis: Australia has a housing affordability problem. But they are wrong in their prescription: their proposal could actually make housing less affordable.

There are several much-better ways to revive the great Australian dream for young Australians.

Home ownership is plummeting

Home ownership rates arefalling fast, especially among the young and poor.

In Australia today, fewer than half of 25-34 year-olds own their home.

Home ownership among the poorest fifth of that age group has fallen from 63% in 1981 to 23% today.

Todays younger Australians are tomorrows retirees.

These trends suggest that by 2056 justtwo-thirds of retireeswill own their homes, down from nearly 80% today.

The governmentsRetirement Income Reviewshowed most homeowners on track for a comfortable retirement. But Australians who rent are facing an increasingly bleak future.

Senior Australians who rent in the private market are much more likely tosuffer financial stressthan homeowners or renters in public housing.

Nearly one half of all retired renters are in poverty with incomes below half the median when housing costs are taken into account. Their numbers will only grow as fewer retirees in future own their homes.

Super cant much help

Saving for a deposit is thebiggest hurdleto home ownership. In the early 1990s it took six years to save a 20% deposit on an average home. Today it takes 10 years.

Thats why the Home First Super Second campaign is superficially attractive. It seems obvious that compulsory superannuation forcing workers to save almost 10% of their wages for retirement stops many from buying a home, especially poorer younger Australians without access to theBank of Mum and Dad.

And its true that allowing people to dip into their super to help buy a house would certainly not leave Australians impoverished in retirement.

Grattan Institute research finds that most Australians would have a comfortable retirement even if they withdrew$20,000early because whatever they lost in super would largely be made up by a greater entitlement to the age pension.

But the problem for the Home First Super Second campaign is that allowing Australians to use their super to buy a home would do little if anything to increase home ownership rates.

The younger, poorer Australians who are increasingly being priced out of home ownership dont have much in the way of superannuation.

The poorest 20% of households headed by a 35-44 year old precisely the group for whom home ownership is falling fast typically have no superannuation.

The next poorest 20% typically have only $15,000 in super.

It means allowing Australians to use their super for housing would mainly help wealthier people buy more expensive homes.

And theres another problem: the more people you allow to use money from their super to buy a home, the more demand there is for housing.

Higher demand means higher prices, meaning the biggest winners would be the people who own homes already.

What can help is more homes

If Tim Wilson and the Morrison government really want to make housing affordable, they need toget more houses built.

Recent Grattan Instituteresearchfinds that relaxing planning rules to allow more homes to be built near the centres of Australias major cities would help.

The federal government has no direct control over planning rules, but it canprovide incentivesfor state and local governments to relax planning rules, similar to thoseput forwardby President Joe Biden in the United States.

As hard as it is, increasing the supply of housing rather than pumping money from super into an already rising market is the smartest way to make housing more affordable. Maybe Tim Wilson could start a campaign.

This article has been republished from The Conversation under a Creative Commons licence.