Well, I found a few contenders
here ... since this album is recorded circa '79, I'm assuming that this fits the bill.
That link gave me Brian Allsop, (who also played with Ashford & Simpson),
Frank Gravis , and a 'Barbara Starkey'...Although whether this is Ringo's wife, or a pseudonym for someone else is a big old question mark.
But the one you're looking for is
Alfonso Carey, who is credited with the bass chair on
Go West and
Macho Man. He ended up playing with Patti LaBelle,
and others .
Howie Epstein (of John Hiatt and Tom Petty's bands) played on
Renaissance.
(Edit)...
'And I'd have gotten away with it, too, if it hadn't been for DWBass' 