[jmulvi]

You are missing the point. I said "educated young people... move to world class cities". These world class cities are also expensive. You pay a lot to live in New York, Los Angeles or London. Unfortunately, this lack of affordable housing pushes out all but the highest paid workers. There is some social housing and other benefits to help the very poor. Everyone in the middle gets squeezed out of the big cities, especially when they marry and/or have kids and need more space. So, a lot more people would like to live in San Francisco for example than can currently afford it. This is why less well educated young people are moving to the newest suburbs. It's what they can afford. These new suburbs often have the fewest and lowest paying employment opportunities so it's a long term drain on the economy and future growth.