The 2020 census is expected to show how rural populations are going down not up.Before you deliver a rural box you first have to have somebody to deliver to. Sure you might put a few more stops out in there but chances are thanks to weather, terrain and poor road quality more boxes simply will not speed up the work pace which in turn will probably require additional trucks all working at the same crawl along pace due to conditions the operator has no control over.
I've had remote routes in Colorado, New Mexico, and Arizona. You'd be surprised just how much does get delivered out there, it's just over a much broader area. You can cover a lot of territory when you're speeding down the local two lanes. There are many small towns where you drive an hour to get to them, deliver 5 to 35 depending on the town, then drive another hour to the next town with a few stops in between. It's actually very satisfying work and with satellite radio it's a great job. I've worked at the edge of the New York City metro area, and in downtown Seattle. I would take my route in southern New Mexico over any of that foolishness any day, even with driving 320-380 miles a day, sometimes over 400, once over 500.