Good reason for this too.
Generally, government employees are paid more, few cut backs, like in the private sector, they giving more paid days off, given top shelf benefits/healthcare, and not to mention those lottery style retirement benefits, etc., all on the tax payers/private sectors backs.
Postal employees have their retirements paid by people who pay postage ~ not mere taxpayers.
Now, about those private sector folks who are driven to violence ~ deadly violence no less ~ by indolent bosses who fail to properly invest retirement funds ~ ........... ~ does that mean that management gets the death they deserve (or what)?