Paul McCartney had a serious problem.  Actually two problems.  The vector for Paul's problem was The Critics.  Some critics saw Paul as the reason for the demise of The Beatles.  That was highly unfair since George, Ringo, and John had all had their bat at "leaving the group" at various points between 1968 and 1970.  John's high-maintenance remarks in 1970, undeniably calling The Beatles defunct, prompted Paul to actually legally quite the group (which in England, required legal processes).  Then Paul released McCartney before the release of Let It Be, after Ringo had been sent to dissuade him from doing so.  In the mind of The Critics, it was all Paul's Fault.  Regardless, McCartney debuted at #1 on the charts, much to the chagrin of the pointed noses at Rolling Stone magazine.  So when Paul & Linda McCartney released Ram, the rabid and fuming critics, lead by the Valkyrie of Rolling Stone, snarled and hissed and nipped at the heels of this effort by Malicious Paul and That No-Talent B*^@&!  Paul's "problem" is that the composer cannot write a song that the musician doesn't want to record.  Evidence: the entire McCartney album.  Although initially written and recorded with The Beatles, Junk is just what it portends.  Paul keeps his closets clean by recording literally everything he writes!  I for one, unlike many others, found this charming, fascinating, and a mark of a true artiste.  I was endeared to Paul and George after The Breakup, found Ringo silly but fun, and quite vexed at John for being such a hateful son-of-a-b*^@& all the time. (In later years, around the time John and Harry Nilsson became buxom buddies, I would forgive John his eccentricities and love the Man as much as I loved his Music).  So coupled with the ire of The Critics, it did Paul no good that his music was laden with little ditties he cleaned out of his writing closet that could be called "filler" by some, or "art" by others.