You actually can have both: dedicate some parts of the city for single-family homes for upper-middle class,other parts for high rise buildings. That's how many

You actually can have both: dedicate some parts of the city for single-family homes for upper-middle class,other parts for high rise buildings. That's how many cities in Europe look like: high density central districts, then some suburbs. The choice is then: do you prefer short commute and living in apartment, or a bit longer commute, but your own big house.