Your explanation is not valid because in 2019 everyone knows what the mafia is; and everyone can relate to a boss, most of us hate them...but I believe the average person dose'nt know what a capo is so its not a minus or plus

"McGurn likes you, so I make you. So you are now one of us, if you fuck up, we take it out on McGurn. He is your sponsor. Fuck up, it's his ass. You work in his crew, he is your capo."