We all know the decline of the middle class is a problem.

FORBES: How Do You Fix the Hollowing Out of America's Middle Class?

The struggles of middle-class families were a big problem long before the recession hit in 2007.

WHITEHOUSE: President Obama News Conference

Mr. Obama also has a problem with middle-class voters.

WSJ: Rove: Obama's Shrinking Majority

How to maintain a stable middle class amid sweeping technological change is a problem the developed world is only beginning to appreciate.

ECONOMIST: The middle-class task- force

The problem is that the middle class, long before the recession hit, was seeing itself squeezed -- incomes flat or near flat and a lot of prices rising.

WHITEHOUSE: Press Briefing

There have been two great articles written recently on the problem of the hollowing out of the middle class in America.

FORBES: How Do You Fix the Hollowing Out of America's Middle Class?

Having a super-wealthy elite is not a problem if there is also a large, stable middle class.

FORBES: America��s Love Affair with Being Middle Class

The Alternative Minimum Tax problem is permanently fixed removing a potential tax danger for middle class families.

FORBES: Here's The Deal On The Fiscal Cliff Deal

Allstate Insurance, another company that started serving middle class consumers that had their beginning in Sears stores, has had the same problem.

FORBES: JC Penney's Misfire: What Went Wrong

Rising housing costs in Shanghai, Beijing and Guangzhou have exacerbated the problem of rising inequality in China, as the major city centers become unaffordable to many middle class and lower-middle class Chinese.

FORBES: As Expected, China Property Bubble Re-Inflates