The 35-year-old real estate developer - who's worth almost half a billion dollars according to Australia's Daily Telegraph - implied that shows like "Keeping Up With the Kardashians" are making younger people think that the lavish lifestyle is normal. One multimillionaire recently dished out some simple yet controversial advice: Skip the avocado toast and expensive coffee to start saving up.
The millionaire's comments sparked a backlash on social media, with people pointing out that the property market has changed drastically since he entered it 15 years ago and calling the real estate mogul a "hypocrite" as he was given a AU$34,000 (£19,500) loan by his grandfather to kick-start his business.
"There is no question we are at a point now where the expectations of younger people are very, very high", he told 60 Minutes.
Asked if he believed many young people would never own a home, the 35-year-old responded: "Absolutely, when you're spending $40 [£23] a day on smashed avocados and coffees and not working".
He later started up his own real estate company in 2015. "That is just the reality".
"They were also the darkest and hardest days of my life - I was only 18 and had just taken on a huge personal loan and needed to stop at nothing to ensure I didn't go under".
The comments echo an editorial piece in The Australian newspaper a year ago in which Demographer Bernard Salt young people could better afford a home if they stopped spending all their money in expensive cafes.
After all, the average deposit for a first time house in London is around £90,000, while an avocado on toast dish will set you back around £10.
Bernard Salt wrote in The Australian a year ago: "I have seen young people order smashed avocado with crumbled feta on five-grain toasted bread at $22 a pop and more". I can afford to eat this for lunch because I am middle aged and have raised my family.
"We're at a point now where the expectations of younger people are very, very high", said Gurner. Shouldn't they be economising by eating at home? "Maybe rather than getting that new iPhone that they just love and they want to go spend hundreds of dollars on that, maybe they should invest in their own healthcare", he said.
Gurner's comments have been compared to recent remarks by USA congressman Jason Chaffetz, who suggested people struggling to afford health insurance should stop buying smartphones.