So, Big Jim should have allowed his underlings to get involved in it and get rich in the process....Maybe they needed his initial investment to get started?

Rico laws weren't in being used so, if Capone and Torrio got caught, Capone and Torrio would do the jail time.

Angelo Bruno should have remembered his LCN history better...When you have underlings that are making considerable amount less than you and, there is a wide open market to earn big, you should either reduce the amount they kick up OR, allow them to break into the lucrative venture. The alternative is rebellion and you die....Bruno actually had to worry about Rico so, a little different scenario.