I've wondered about this too. I tend to think these thoughts when I see someone who has spent $80k for a custom pretty truck, and realize they earn maybe half that per year! I also don't know how people are paying 10x their annual earnings for a house, spending >50% of their income on payments and housing bills.
One issue is there's an outbreak of luxury. You can't buy a basic no-frills car like you could in the 1950's to 1990s because none are made. Similarly, builders are not building any 1,000sf 2BR houses like they were in the 40s or 50s. Yet these are exactly the sort of things people need to be buying, rather than feature-loaded SUVs with $2k infotainment systems and $2k fancy wheels, or 3,500sf McMansions. At least part of the root cause is that only luxury products are available in many categories, and it is considered highly abnormal to do things like biking to work or using a dumb phone.
People's concept of normal is $60k car, $500k house, vacations twice a year, multiple walk-in closets, restaurants every other day, $8 coffees, meat every day, etc. but they are not producing that much more than people were producing in an era when only basic things were ever purchased. This is what is meant by "what it takes to get by these days."
The retirees with half-million dollar rock star tour busses on payment plans are the ultimate expression of unrestrained consumerism, and the next generation will suffer for them.
What's the societal repercussions when you have millions of young adults thinking why even bother to try they could never save enough for a good home in a safe neighborhood, they'll be renting forever? I'm the guy who typically thinks anything can be done if you work hard enough, but when even I am starting to wonder if we've priced things so astronomically that the math to get there is just so depressing is it tipping into a dangerous point?
When people feel like the rules are rigged, they tend to rebel against the existing rule and authority structure. This is what drew a lot of frustrated working class people to the MAGA movement, which involves blaming other categories of people for the problems. In other corners of the internet, people apply Marxist thinking to explain why they can't get ahead, which is also a blame ideology.
Of course, blaming others is just a deflection of blame from oneself, which is satisfying but ultimately counterproductive. When enough people behave counter-productively like this, you could see a tipping point where poverty is the next thing to come.
The MMM philosophy is unique (and perhaps most accurate) by turning the focus onto our our behavior, decisions, and hacks - but it would reach a limit when the external world gets too ridiculous. E.g. Coupon clipping and DIY home remods only get one so far when the fixer uppers are a half-million dollars and mortgage rates are >6%. 100% stock market allocations look a lot better when the CAPE is <35, a condition that has never historically been associated with 10 year annualized returns over 5%.