FIfteen men on a dead man's chest , Yo ho ho and a Bottle of rum

Robert Louis Stevenson was maybe plagiarising when he lifted this phrase into his Treasure Island. But in doing so , he made it so famous and maybe the original author had not intended it this way. But what actually did he mean by "Fifteen Men" and Bottle of rum. The last line is Drink and the devil did the rest. So it is my guess that if you are a sailor , you would either die at sea ( Dead Man's Chest) or by drink or if all else fails , the devil would get you.
I would agree rum is a vile drink but sailor and death?? I would not think so.
Saw this piece of literature and decided to post my comments on the same.. seems interesting though... Drink and the devil...
Please voice your comments on the same.