Bonhoeffer uses a similar phrase 'worldly Christianity'. It's J Gresham Machen that I want to line up most closely with. See his Christianity and culture here. Having done commentaries on Proverbs (Heavenly Wisdom) and Song of Songs (Heavenly Love), a matching title for Ecclesiastes would be Heavenly Worldliness. For my stance on worldliness, see 3 posts here.
I remember being sat watching TV in the seventies when this came on. It had such an impact on me that I've never forgotten it although I forgot what it was called, confusing it for years with the Ugly Bug Ball. Good old Youtube.