I've always loved that song in Rolph's rendition.
Somewhere I have it on an old audio cassette.
They are very appropriate words for the world now.
Googling 'A Rum Sum Sum' brings up lots of hits for the basic 'chant' with actions - for kiddies.
I don't know who wrote the thought provoking lyrics as written above.
'Learn the other fellas folk songs ..' etc.
Laurie. Melbourne, Australia.