There exists a diminishing return on the benefits one rich individual can have on society. While they are more apt and able to finance investments after a certain point money can just stagnate or worse be used for things harmful to society, whereas a ton of money could easily accomplish negative outcomes. This all depends on the person of course.
The "rich get richer" effect is about opportunity and by itself is not an issue but if opportunity is loss on the least of us tyranny is established, class systems, oppression. This concept in video games, well I suppose MMORPGs are a prime example. It is not bad there because everyone is along for the ride, able to progress on equal terms as everyone else without much or any negative effects if you screw up. The richer effect is good, poverty is bad.
Economically theories can point to unchecked wealth as having the greatest benefit but we are complex creatures and certainly do not always make the best decisions. This is why I support a progressive tax system. It allows people to become wealthy while ensuring an amount is giving to society. The trick is proper governmental spending. There might be some investment efficiency loss but if it creates better infrastructure to maintain opportunity for everyone it is better for society.
Before the PS3 everyone was nice to me :(
