In a perfect society, companies would find that the more negative externality they create, the more difficult a time they'll have finding people willing to do it for them. One case in point is when a civil-oriented software company starts taking on military contracts and putting their people to work towards death and destruction. In a perfect society, the reaction we would get is the employees going "wait a second; I liked this company when I joined, but I never signed up for this." … and even in our less-than-perfect society, we do get some of this; what we need is more of this, not less.