Government does some things really well. For example, the Social Security Administration is almost unfathomably efficient, compared to other large national or private retirement systems. For example, the overhead of SS is less than 3%, compared to something like 30% for Chile's privatized retirement system, lauded by conservatives.
Efficiency is worthless unless it is also effective. I can be very efficient digging a hole and filling it back in.
How people can both believe that post office workers are lazy, yet at the same time be so stressed out and overworked as to be the archetype for "going postal", I'll never understand. Cognitive dissonance at its finest.
Lazy is not a term I've heard describe postal workers very often, but that term justifies your rant so whatever. My dad retired as a postal worker, was even part of the intervention team dealing with workplaces to prevent people from "going postal". It wasn't about being stressed out and overworked. It's a combination of low barriers of entry for the job, conflicting personalities, etc. Besides the fact they are one of the largest employers in the US (which makes them an easy target) you are going to have some crazies.