No shit it loses money. It’s a service. Not everything has to be run at a profit. Bring weekend and the return of direct to door delivery. Provide better shipping rates and services, combine parcel and mail delivery. Only deliver mail when critical items arrive or with packages.
I feel like there are creative ways to balance it, but they’ll always run at a loss if they have to cover this giant country and provide equal services. I’m fine with that, it’s a great use of taxes.