I'm wondering, in the absence of junk mail, if the post office could reduce prices on package delivery. I'm not sure where the main costs are, but if they're in

I'm wondering, in the absence of junk mail, if the post office could reduce prices on package delivery. I'm not sure where the main costs are, but if they're in the last mile... well now the post office would have trucks with a lot more space on them driving through the same routes anyway.