"Third World America" or Third World in America?

I have read through Third World America (Arianna Huffington), which describes the details of the widening gap between the rich and the poor in the American society. The gap is widening, the author argues, because of the massive loss of the middle class there. The gap is deepening because of the fall of their middle class into poverty. The situation the fallen middle class face there, is devastating. The first 4 chapters, accordingly, sound very pessimistic and grave. A businessman was, for example, laid off. He joined “a number of LinkedIn groups”, used Twitter, “which he discovered can be a powerful jobsearching tool,” and did countless other digital efforts only to be “still looking for a job.” In the 5th chapter, however,the tone changes dramatically. The author talks positively about legislatures and community NPOs to suggest solutions. Here, even those digital efforts read promising. I wonder, if they can work, why they haven't worked. The contrast between the pesimism in the 4 chapters and the optimism in the last one seems to me to imply the depth of crisis itself. After World War II, western developed countries came to import various second-industry goods from developing countries then. As a result, some developing countries, including Japan for example, have become or ar becoming developed countries. During the process, those western countries “exported” second-industry jobs in other words. The export has led to the large-scale loss of their middle class, especially after the fail of their third industry. Is America becoming Third World? I don't think so. By exporting their middle class jobs, they have imported not only low-wage jobs, but also unemployment and underemployment. That is, they have imported Third World in return. Today, as the result of globalization, every developed country is going to have its Third World in itself. If we should narrow the gap between haves and have-nots, we should materialize the policy worldwide, avoiding conflicts among global have-nots.