Here is a book that proves more than anything so far that we need DG, and fast!
Bill Moyers interviewed the authors and you can read the transcript here.

A book: THE SPIRIT LEVEL: WHY GREATER EQUALITY MAKES SOCIETIES STRONGER by Richard Wilkinson and Kate Pickett, who together have spent more than 50 years studying how inequality affects the health of a population.
RICHARD WILKINSON: Well, what we’ve discovered is health is just one of many issues which are worse in more unequal societies, including violence or teenage births and all sorts of other problems. These are not just a little bit worse in more unequal societies, but are much worse.
Also among their findings:
The most unequal countries have more homicide, more obesity, more mental illness, more teen pregnancy, more high-school dropouts, and more people in prison.
The more equal the society, the longer its people live.
The United States has the greatest inequality of income of any developed country except Singapore.
The United States is one of the most economically stratified societies in the western world. As THE WALL STREET JOURNAL reported, a 2008 study found that the top .01% — or 14,000 American families — hold 22.2% of wealth. The bottom 90%, or over 133 million families, control just 4% of the nation’s wealth.
Robert Reich, the former Secretary of Labor in this country, reminds us of the great gap that’s open between CEO’s and workers in this country since the ’40s and ’50s and now. “In the 1950s and ’60s, CEOs of major American countries took home about 25 to 30 times the wages of the typical worker… by 1980, the big-company CEO took home roughly 40 times; by 1990, it was 100 times. By 2007 …CEO packages had ballooned to about 350 times what the typical worker earned.”
KATE PICKETT: The most important pressing need is to close that income gap, to reduce inequality in society.
I think anthropologists estimate that we’ve spent about 80 percent of our time as anatomically modern human beings in quite egalitarian cooperative societies. Hunter-gatherers are very egalitarian. They need to keep the peace between each other. They share. So, we’re clearly capable of living in very egalitarian settings. But human history shows that we’re also quite capable of living in very tyrannical hierarchies as well. And we clearly have the capacity to do both.
The big story that’s come out of all this research is, for instance, that friendship is very protective of health. The quality of your early childhood is very important. And issues to do with social hierarchy are very important.