How can I be so sure? Without the USPS, the US economy grinds to a halt. It doesn't slow down - it stops. Untold billions of dollars of commerce flow through the USPS every single day: bills, statements, invoices, packages, parts, hardware, software, pharmaceuticals to name a just a few. Over eight million jobs directly or indirectly depend on the USPS's operations. Its own forecasts show it will still move in excess of 150 billion pieces of mail in 2020.