USPS didn't 'lose' money. They were railroaded into paying for pensions in an attempt to kill them off.
http://m.govexec.com/management/2017/09/usps-defaults-billio...
The postal service owns tons of valuable land and also could easily charge amazon, etc. competitive rates when abused for their last mile services.
I'd rather my postal service not be treated like another shitty wall street commodity. We all benefit from its continued existence, warts and all.