I wish I could see things in the same empirical sense as you do. From the "wattage" perspective, it certainly makes sense and the disparities in power between all people indeed have comparatively little variation - it makes me think of Dragonball Z (ever watch that?) - but at the same time, having this immaterial power that I speak of can also effectively multiply the amount of "work done" with respect to your pursuits.
RE: What makes a person powerful?