There are thousands of contract workers who only deliver mail on Sat. I know someone who does this. Most have other jobs and do this for some extra money. Those jobs would no longer be necessary.
That’s not enough of a cutback, though. The pension and healthcare costs are where the real money is.
They could get rid of the pension portion of the retirement plan. The TSP is like a 401k, and I think that is the bulk of the retirement plan anyway, although I could be misinformed about that part. I do know that the 20 years/3 highest pay years pension stuff is what makes people who HATE working for USPS stay. To collect the max they can get. It’s stupid.
If they get rid of the pension, I think that alone would improve personnel quality and save gobs of money.