Hey Mike your lack of understanding in regards to the postal system is huge. First of all, we are more of a parcel service these days, which often requires getting out of the vehicle and going to the door. Each time that happens the carrier is required to shut the vehicle off and lock the LLV. You wouldn't want your package to get stolen from the truck right? No one wants to walk to their mailbox. Placing them further from the house is not a winning concept with customers.
Your idea of every other day delivery is laughable. Sunday is not a delivery day for our particular location. Although it is required from Thanksgiving to Christmas. Parcel volumes are tremendous. With just the Sunday nondelivery our staff is overwhelmed every week. It creates delays in getting carriers to the street. That in turn creates massive overtime and overworked staff. I doubt many people would work for the postal service that worked them that hard and cut their hours. It is very hard to find people now.
People's habits have changed, probably permanently, with ordering things online. They get irate quite easily with even a one or two day delay. Your every other day concept doesn't fit most people's needs.