Are we? When you zoom in on things like road maintenance backlogs and auto loan delinquencies, it kind of seems like we are not rich enough but have been pretending to be.
even more so if you price in eco externalities
The delinquencies are the ones you hear about. What doesn't get reported, statistically, is when people are balancing absolutely everything in their life on a knife's edge to fit the car in with all their other expenses when they are living on a meager salary (or unemployed).
And that is only on the private individual's side. Costing out car-dependent development in terms of building and maintaining roads, bridges, power lines, water pipes, trash collection, wastewater treatment, fire, police is all monstrously expensive, and it is one reason why when the roads get damaged from use and need repair, they get chronically backlogged and problems keep mounting for years and years.
One thing people notice about Japan and the Netherlands is how immaculately maintained the roads are. They are significantly more pleasant places to drive, specifically because they did not overbuild road infrastructure.