There are many ways to cut costs. Ask any company that has tried to reduce costs. Or even look at your own household situation. You can cut down on take-out dinners, cancel a vacation, or drop a gym membership you aren’t using anyway. But at a certain point, you realize some costs are just not in your control. You can’t do much about what the utility company charges you or what it costs to fix your car when it breaks down.
The same is true for the U.S. Postal Service.