Spineless.
It is absolutely necessary to cut those offices and facilities and go to a reduced delivery schedule to make the USPS competitive...yet they won’t do it. Who besides the unions would be behind such a brain-dead move?
Not really. What's necessary is for Congress to reverse its decision of several years ago requiring the Post Office to prefund its pension account. If the USPS could fund its pensions like every other company in the US, it would save some $6 billion a year.
The rest could then be achieved by cutting office hours (say, from 8 to 6 hours a day) and through buy-outs of expensive employees replacing them with new, cheaper personnel.