That the (whip boy) trader was executing trades as ordered by his (master) superiors in his own name, i.e. taking all the risk, but sharing the profit?
I don't think one has to order people to break the law. I think it's easier to establish aggressive incentive systems that encourages employees to act very single mindedly. I also think it's easy to undermine internal controls by putting incompetent people in charge who are easily intimidated with bad performance reviews.