As always, any human based endeavour is corrupted by thievery by “sinful” humans. Pretty soon Uber and Lyft will be using cars with physical dividers, cameras automatically sending video to a cloud based center in real time, armed drivers, drivers vetted for past criminal records, passengers only picked up after passing security checks, automatic GPS tracking, and their own security detail.
Amazon, and other e-”mail” order services, will have distribution (customer pickup) centers that have bulky or high ticket items. The pick up centers will be located next to supermarkets in formerly deserted malls. If the USPS wants to save money they could do the same. For what it’s worth or IMHO.
So be it.
It is a federal felony to be armed in a Post Office facility.