By far the most heavily subsidized, most expensive, poorest and least educated people in the United States are the poor living in urban zones. It's not even remotely a close comparison in terms of numbers.
You can see it in the crime statistics, you can see it in the drop-out rates, you can see it in the homelessness rates. And so on.
You can also see it in the cost of incarcerating violent criminals (not drug offenders, which are a shrinking, smaller share of the incarcerated population), which urban zones produce radically more of to go with the extreme poverty found in US cities. The urban zones - which are hyper dangerous in the US - produce the overwhelming share of all murder in the country. Who pays for the very expensive policing necessary to keep terrorist groups from burning Portland to the ground? That isn't going on in rural Oregon. Who pays for the very expensive policing to try to control the extreme murder rates in Baltimore or Chicago? That isn't going on in rural Maryland or Illinois; the per capita murder rates in Baltimore are 50x to 100x higher than in rural Maryland. These things are all subsidized by the urban high income brackets, and it's a huge cost.
And it's also true that the urban zones have far higher incomes, so they pay higher taxes and push more money into the welfare system accordingly. They subsidize both their local urban poor and the rural poor outside the cities.
The bottom 10% in Los Angeles represent a de facto third world standard of living and it's a very large population. Those shocking, unbelievable homeless camps in Los Angeles look like something out of a sci-fi dystopian movie. And that's just a very small fraction, a small visual representation, of the extreme poverty in cities like Los Angeles or Chicago.