Then let them stay alive, with one employee per state whose job is to sit at a desk and try to stay awake all day. Pay them a salary of $1 per year. (I'll bet the Constitution doesn't mandate how big they have to be.
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The simple point is that the USPS is a huge waste of money, especially when FedEx can get stuff there faster and more reliably. I don't trust the USPS, and neither should others. (By extension, this also means I no longer trust UPS, as they contract some of their deliveries out to the USPS. Since they can't guarantee me that USPS won't handle/deliver my package, I don't use their services anymore.)