John Challis tells the story that in the late 1970's he was summoned by one of her Majesty's Tax Inspectors to discuss his meagre contribution to the Inland Revenue.
John notes that he sat before a middle-aged grey suited man who had obviously not seen the light of day for some time and, after a few minutes silence, the Inspector looked up and said: "You seem to be remarkably unsuccessful in your chosen profession, why don't you give it up and do something more rewarding?"
John thought for a moment and replied: "What? You mean become a tax inspector or something?"
"There's no need to be offensive," replied the Inspector.
John says he's rather glad he didn't follow the Inspector's advice. [Since then he's gone onto star as Boysie in Only Fools and Horses and in the spin-off sit com The Green Green Grass]