The post office can not layoff letter carriers as they have a "no strike , no layoff agreement".
The current problems at the post office are caused by mismanagement at all levels. The employee can only do what their told to do by management.... If you ever have a problem call 1-800-ASK-USPS - every time include time and date of complaint, it's easier to track down things that way. It works pretty well as we have a dedicated team for this...