INTJs are all about efficiency and implementing the best strategy. Whenever you talk about efficiency, you're talking about the maximum effect for the minimal work. So we have to define both work and effect. We're natural problem solvers, so when people come to us with problems the desire is to resolve them as efficiently as possible.
John Nash, the mathematician, was an INTJ. Have you ever seen the movie A Beautiful Mind? He wrote an absolutely brilliant concept best expressed in
this link. Anyway, the idea that the MOST good can be achieved through a cooperative strategy definitely seems to hold a lot of weight for INTJs.
Also, when we define "maximum effect" as a desire to produce the most good that might be linked somehow.
Final answer? I'm not really sure...