Is Wealth Inequality in America Fair or Unfair?

The difference between the "haves" and "have-nots" is bandied about in political discussions all of the time. The above video does a great job of showing some of the disparity in America and why discussions about the 1% and income distribution are so visceral.

The video does little to discuss the causes behind the disparity or recommend solutions, so I'd like to hear your thoughts. Here's a list of questions to ask yourself after watching the video.

1. What is causing this disparity? Is it natural talent, cheating, something else?

2. Should government do anything about this?

3. The video does not treat the groups as fluid. Is it possible that individuals move from one group to another relatively often and if so, does that make the system more fair?