Have you ever wondered why the drug cartel members get those scary tattoos from head to toes? Is it just because it makes them look meaner and tougher than the average Joe? Or is it because they simply like getting ink on their bodies? According to Tom Wainwright, the author of ‘Narconomics’, a book that delves in to the economics behind large drug trafficking rings, there are financial reasons that lead some drug cartel members to cover their whole bodies in tattoos. It is a way for their bosses to control them, he explains.