Is it because they're generally attacked by they own disgruntled employees, who aren't not satisfied with their fat bloated lottery style government pensions?
BTW, I was talking about the tens of thousands of mailmen...You know, the ones that go door to door, and into peoples yards..
How is it possible mailmen survive from day to day without gun?
I'm giving you answers to satisfy your curiosity just in case your intent is to try a daring day time street robbery or something.
Don't do it.