The laughing Taxman - by Ronnie Barker

I found a reference to this song in the delightful Autobiography of The Two Ronnies "And it's goodnight from him..."

Written and sung by Ronnie Barker, it's clever, funny and worth listening to right through to the end. It's only a minute and half long.
Clearly inspired by The Laughing Policeman....

listen to ‘The Laughing Taxman’ on Audioboo