Socrates argued if you believe something is evil and powerful people do evil then by definition they are not "powerful" -- they are just "evil". As a corollary, if you believe something is good and the people who do good happen to be the weakest members of society, by definition, they are "powerful" -- it is society that is messed up.

Getting the feeling that Socrates had a different definition for "powerful" than most.

Philosophers in general tend to have a different (more profound) definition of things than others do.