[bluGill]

Over the last 100 years those suburbs have added all of your list, plus parks (which were not common 100 years ago), internet, cable tv, phone.

Which just goes road prove they are sustaining themselves.

[medvezhenok]

That doesn't prove anything.

I could buy many things for myself by putting them on my credit card - that doesn't make my spending habits sustainable.

The whole point of strong towns is that the Government financed the projects but not the maintenance, and that the suburbs can't afford the maintenance bills (at least some of them) under the current tax regime.