One of the misleading things about this article and many others like it is the idea of a "wealth gap." These are statistical categories, not flesh and blood people.
Sure, "the rich" may be far richer than "the poor," but these don't comprise the same people every year.
Studies that have actually tracked flesh and blood people find that those in the lowest brackets frequently move up to above average brackets. Also, those who comprise "the poor" are made up of teenagers and recent immigrants, who can't earn more than minimum wage anyways.
And people in the wealthiest brackets don't usually stay there for long
Here's a video that explains it quite concisely:
http://www.learnliberty.org/content/are-poor-getting-poorer
ALSO, the government (whoever happens to be in power) does everybody a double disservice because they:
1) Create laws which distort the economy and make it harder for people to move up from lower brackets to higher brackets
2) Distort the statistical brackets themselves, because the average salary/benefits of government workers is much higher than the average non government worker. In short, through their policies, the governments are stealing from the poor (people in the lower brackets trying to make a living) and giving to the rich (mostly themselves and those connected).
Of course, then the government looks at these discrepancies and claims they need to institute more government meddling in the economy, which only makes things worse.
To make things worse, they blame "the rich" as if the poor had some money once upon a time and "the rich" came and stole it.
It's government and it's corrupt policies that do most of the damage, and it's government that needs to be eliminated altogether.