Is "the rich getting richer" a problem?

[richardhutnik]

So now, it isn't just the rich getting richer, but the middle class lost like 40% of their net worth and the median declined:
http://www.nytimes.com/2012/06/12/business/economy/family-net-worth-drops-to-level-of-early-90s-fed-says.html?_r=2

So, if people want to branch out further, is this ok?