I don’t think that actually matters. Think about it. How can such a huge country as the US manage to have such large houses for each citizens or so many large cars? Should that not be hard when there are so many people to do that for than if it was small?

Not really, because all the resources are proportionally larger. For each individual American town it is irrelevant how large the rest of the country is. They have their citizens and their tax income. That is what matters. It is a local decision.

If population size had mattered in that way, then facilities would have declined with population growth.

Also it is not quite true that there are fewer facilities. In Canada where my mother and father-in-law lives they got huge high rises with lots of facilities: door man, swimming pool, library, and many other things which would be unusual over here.