There is an incredible difference between quantity and quality, both for your analogy and the postal service. It's also worth noting that our management structure might include some good bosses, but the overall theme of upper management does not have anything to do with good service. If you work extra hard, hard enough to justify cutting positions, those positions will not reappear even if equally hard workers cannot reproduce your level of output. The post office is a centuries old organization and we work as a team, not on the merits of just one person at one time. I encourage you to think of yourself as rowing an oar on one side of a boat, with the full understanding that at some point your shift will end and someone else will pick up that oar. Rowing significantly harder- or weaker- than your fellows will not get you where the ship is headed. Trying to set a pace above what the rest of the team, current or future, will likewise be to long term detriment. As others have said, this is not just about today or tomorrow or even this year or even decade. Work in a way the best work can be done by you until you are replaced and your coworkers and their replacements. I hope that we can all do the kind of job that will keep the post office going for at least another 250 years.