Why have they been doing it for the last 100 years? There are young wannabee in their 20's that work for some middle aged guy that they look up to, usually one of the young guys is related to them, like an uncle or something. He then kicks something up to the old guys because they are probably related to them in some way too, and they feel the need to provide something to them. Maybe the kickup ain't even much but they get most of their earning from legit businesses they own from the years of illegal money.