Who is "John Barleycorn"?
John Barleycorn - folklore personification of beer, ale and whiskey that is alkagolnyh drink at all. It is believed that John the mythological character of the ancient Celts supposedly granted the secret to cooking these drinks. As part of English folklore, John's name is used figuratively in many works of English writers. (there is an autobiographical treatise on alcoholism, "John Barleycorn," Jack London)

Question

Who is "John Barleycorn"?
 John Barleycorn - folklore personification of beer, ale and whiskey that is alkagolnyh drink at all. It is believed that John the mythological character of the ancient Celts supposedly granted the secret to cooking these drinks. As part of English folklore, John's name is used figuratively in many works of English writers. (there is an autobiographical treatise on alcoholism, "John Barleycorn," Jack London)

Answer

For Steve Winwood (author and composer of a band named 'Traffic')
he is somebody 'who should die', but only because he impersonates the 
raw ingredients (barney) that will make beer, whisky and other alcoholic 
beverages, and the endless cycles of Nature as experienced by a good farmer: death is harvesting.

Answer

Liquor.