The USPS continues to run at a loss.
I have to ask: why do we need 6 days a week mail delivery? (Particularly for residential mail.) I check my mail service box twice a week or so - that keeps me sufficiently up to date with the few things that still come in the mail, while matters that need immediate attention come through email, text, or phone.
I would suggest changing to twice a week mail delivery for home delivery: say Monday and Wednesday to half the addresses covered by a sorting station, and Tuesday and Thursday delivery for the other half. Perhaps businesses could have mail three times a week - MWF and TuThS.
By changing and consolidating delivery routes, it should be possible to cut the number of mail carriers down by half, if not more, saving the USPS a bundle on labor costs.