Lets face it, we all put pants on one leg at a time. Every now and then someone seems to think they were born with pants on. 100 years from now we will all have been found as individually insignificant. The fear of insignificance can drive the desire for control and spur greed in a vain attempt to at least appear more important than others.
Anyone who allows unabated greed to rule their life naturally gathers together things that people who have their greed under control don't fight to retain. The more they get the more they want and think they deserve.
Once identified, the Megalomaniac must be stripped of his excesses and given good honest labor to perform.