Leave the city and its uncommon to find a moderately underutilized truck. The Ford F150 is the most popular vehicle in america for a reason, and it's not because people like trucks. It's because they use them. Towing capacity, cargo space, gravel or dirt roads. Live in Michigan with tough winters? Have fun in that shitty sedan.
That said, american trucks are definitely oversized and the average owner would get the same utility out of a Kei truck.
However, who replaces the aging workforce? Who pays for social security? Back in the 60s, it was a ratio of 6 workers per 1 retired. Now, it's 3:1. Soon, it'll be 2:1. That's bad. Very bad.
A smaller working population and a large inactive population create huge labour shortages which must be filled by migrant labour which creates additional problems.
One solution is enabling people to work for longer but this is challenging. Do we push the retirement age to 75? What about the declining health and abilities of ther population.
People are having children much later than normal. Births under the age of 20 have dropped 90% in the last 10 years. We are aging faster than we are replacing.