Good suggestion. That is part of the bill in the house that they will not bring to the floor. That provision would restructure the remaining 6 years of payments over the next 40 years. USPS basically owes around $32 Billion to this fund. There is already around $23 Billion in there now.
Why the rush to fund something that isn't expected to be needed for 75 years? Why does it have to be funded to 100%?
That is something missing from the story. This isn't for any benefit of current retirees or workers, it is for FUTURE retirees, many of whom are not yet even born let alone can be counted as a USPS liability.
What sense does that make?