OCU,
re: "It was recently reported that the top 20% in this country now own 84% of the wealth of America."
I hope you won't try to argue that you aren't included in that "top 20%." Do you feel guilty about what you've got?
Since average household income in the United States is about $48,000, I'd guess that the top 20 percent is probably households bringing in more than $75,000.
In other words, it is every household that is even moderately successful.
re: "When are we as a society going to acknowledge that that's enough?"
When are people going to stop being stupid? A decent living is DESERVED by "the top 20%." They're generally the 20% who went to college and got their degrees.