Denny Laine has a co-writing credit on that one. It does sound like George and so does Denny:
I'm kind of an odd-job man in this group. I look on Band On The Run as definitely their album. We're not a group anymore. I'm one of the three or I'm an individual. If it was Wings, I'd feel more a part of it. But it's not my songs and I'd like to feel more involved and contribute as much as they do. I did write one of the songs on the album and Paul helped me out with it. I'd like to do more like that.
Yes, maybe it's more a Denny Laine's song than a Paul's theme; but I considered it just because it's part of Paul's catalog.
Moreover, Denny's words confirm my belief that Wings was basically Paul solo instead of a true band project, at least at that period in 1973.