> which means that mail in cities tends to subsidize rural services
Do USPS or other mail services in the US have pricing that depends on location? In Poland where I live (much smaller, more uniformly populated and not federal country), I've seen no such things. The prices are the same everywhere, so it seems to me that in every private, commercial mail service the cities kinda subsidize the rural areas.
USPS is equal priced as you say. A letter sent to Manhattan is cheaper for the USPS than a letter sent to Nome, Alaska, but both cost the sender 73 cents. Parcels sent by USPS are priced based on regional zones (roughly corresponding to distance traveled), but these are very coarse-grained.
UPS and FedEx and some of the other private shipping services have much more fine-grained pricing based on where something is going. This means that if you are Amazon, it is generally cheaper to send packages to cities by private carrier and cheaper to send to rural areas by USPS.
Do USPS or other mail services in the US have pricing that depends on location? In Poland where I live (much smaller, more uniformly populated and not federal country), I've seen no such things. The prices are the same everywhere, so it seems to me that in every private, commercial mail service the cities kinda subsidize the rural areas.