Clearly you didn't read the article, otherwise you'd know that even slight increases in this tax would fund important public services. You'd also know that the U.S. has among the lowest levels of class mobility among developed nations. People born rich stay rich; people born poor stay poor.
This is simply not true, read the other comments on how much wealth is retained per generation.
As for the your last sentiment, I'd also remind people that wealthy inequality is not a very big problem if the standards of living are also improving.
Most "poor" people have plasma televisions, iPhones, fridges, their own living quarters and more choice of food than a king 300 years ago would have.
