In the past I used to counter any such notions by asking myself: 'Would you really want President Hattersley?' I now find that possibility rather cheers me up. With his chubby Dickensian features and his knowledge of T.H. Green and other harmless leftish political classics Hattersley might not be such a bad thing after all.
That's the beauty of music. You can take a theme from a Bach sacred chorale and improvise. It doesn't make any difference where the theme comes from the treatment of it can be jazz.