How can you say that? Usually nice suburbs pay huge amount in taxes that subsidize urban cores.
There is a company (urbanthree.com) that does financial modeling and produces heat maps to show the net gain/loss of a city based on area. They routinely find that the denser areas are financially solvent and supporting the city and the suburbs are not solvent.
That nothing i've read acknowledges that fact suggests they are cherry picking evidence instead of giving an unbiased analysis .
Subsidized by urban cores.
Who do you think is paying for those $50M highway exits and overpasses so everyone can quickly get to their strip malls? Its not the local residents.
When people talk about the “subsidy of the suburbs” they usually talk about the cost of maintaining suburban life, vs the tax base that supports it. Eg property tax usually goes to the town to pay for the town’s infra, while income tax goes to the state to pay for other thing. When the town can’t cover its cost and depends on the state’s money or when the state pays to build things in the town, that’s where the “subsidy” comes in. Often towns just can’t cover the cost of their basic infrastructure maintenance, but even when they can, the state usually still build highways and other big projects which can cost $10s to $100s of millions, and rarely can be affordable by the actual tax base of the town.