I think the bigger issue is the need for a car. In most of the US, everything is built with the assumption you'll be driving to it (workplaces, stores, facilities, etc).
So everyone has to have a car. So your social mobility is limited by the fact that you need to have the money for the expenses that go with it in the first place.
3-4 cities with decent to good transit are the exception, but the fact that they're so desirable and with such high housing prices means that they aren't really accessible either.
So everyone has to have a car. So your social mobility is limited by the fact that you need to have the money for the expenses that go with it in the first place.
3-4 cities with decent to good transit are the exception, but the fact that they're so desirable and with such high housing prices means that they aren't really accessible either.