Gallows humour

To Blaby Labour Party today for a fundraiser-cake, music and quizzes. I dredged this joke from my folk memory
An old man is sick and he fears that his days are numbered. He asks his weeping wife to bring him his Labour Party and trade union cards and he tears them up in front of her." I'm finished with this-I'm a Tory now," he announced. His wife is horrified." But why, Fred? You've been a Labour man all you life and the union has been everything to you. Why this? " Well, I'm not long for this world, and its better that one of theirs goes rather than one of ours."