But living standards are higher in the US, and our trips are longer. To drive my family across Texas is nearly as far as driving across France and Germany, and I have three other states to cross.
If I can afford to pay more to get a bigger, faster, safer vehicle for the trip, it’s my money.
EDIT: Yesterday I had to run to the store to pick up a vat of queso. I'd like to see you Europeans do that in your Mr. Bean cars.
I doubt there is any conventional metric for "standard of living" (which basically means per capita wealth/income) where the UK would be higher than the US, at almost any point on the income scale (even adjusted for the imputed value of the more extensive public health system in the UK).
That doesn't mean the UK is "worse" than the US, or that it has a lower quality of life, just that it has (and has had) a lower standard of living for decades. Few countries car match the standard of living of the US.
That said, I find it notable that the average price of new cars in the US has typically been rising faster than income over the last decade or so. This would indicate, bluntly, effective advertising, rather than resources, being a big driver of the huge car thing. Average new car price in the US is creeping up on average annual income. This isn’t just an American problem, incidentally; it’s happening in a good few countries.