This whole argument is misleading when annual income is used to rank wealth. There is far less movement when net worth is used.
Not only that.
The data regarding income inequality is worthless as long as the government doesn't categorize "free" handouts (like AFDC, food stamps and EITC) and free services (like Obamacare, Obamaphones and college) as income.
After all - we who pay our own way have to pay for those things with money we actually earned.