suburbia grows because people are moving there in droves for the "better schools", "less crime", or whatever other reason they can rationalize getting away from the dilapidated cesspools of the inner-city.
Thats pretty much it. They move out of the intercity to a place where they can have their clean air, little pink houses, a backyard, and whatever else. It was the pursuit of the American Dream that drove people to the suburbs, not the cost of living being out of control in the intercity.
Look at all the boarded-up houses that were once homes to families that had an auto plant worker bringing in the bread.
What was once the suburbs is now the intercity. Look at all the new housing complexes going up in the present day suburbs.
Since you seem to have only glanced over that link, let me point out a few key facts relevant to this argument that are mentioned there:
After doing a little research I realized your getting your facts from a self declared democratic socialist. After all this and reading the banter you've been engaging on another thread, I can't say I'm surprised.