I mean, honestly, yeah? I'd rather not my roads focus on being profitable. I'd really prefer the opposite of my police force focusing on being profitable. I'd really start freaking out if my voting system(the actual counting of votes) focused on turning a profit, and probably take to streets if my public schools were trying to profit off my children.

Efficiency, sure, what's inefficient about the USPS? I sent a package over my lunch break today, and my package delivery is 10x better delivered by a USPS mailperson than someone hired by amazon. (A USPS mailperson leaves a package at my door, but I've had packages from amazon thrown into my bushes, or dropped beside the street)