This guy is an absolute clown but he makes some good points.
See also this Reddit post:
The problem is on the demand side. Over the past 20 years there has been a big increase in investment demand for housing. Compared to first home buyers, investors are more likely to be richer and have higher incomes.
They have flooded into the housing market biding up the price and locking people out of the market.
What caused the rush of investors? It was the interaction of two tax concessions, negative gearing and the capital gains tax (CGT) discount.
In 1999 the then Howard Government introduced a 50% discount on the tax of capital gains. That means that if you owned an investment property for more than 12 months you got half the capital gain tax free.
This meant selling a house for more than you bought it was a great way to earn income. Negative gearing meant you could afford to bid up the price of houses and make a loss because you could write the loss off on tax.
Every home where an investor beats out an owner occupier means one less homeowner and one more renter. For people who can buy a home, the higher prices have meant bigger mortgages, paying more in repayments, and having less to spend on everything else.
The solution is to cut back negative gearing and the CGT discount. This will reduce investor demand for housing and make housing cheaper. It will also raise billions in extra revenue that can be used to build more houses, increasing supply.
The Labor Party know that cracking down on investor tax concessions will make housing more affordable, they took exactly this policy to the 2019 election. What they fear is the Coalition running a scare campaign against them.
But what both the major parties should fear is the growing anger of those trapped out of home ownership and those burdened with massive mortgages. More phony housing affordability policies that do nothing to fix the problem will only fuel voter disenchantment.