You may be interested in this book from Barbara Ehrenreich. Smile or Die is a rebuttal to the rampant excess of positive thinking. I read the review in LeMonde:

"Perhaps the most eye-opening chapter in Ehrenreich’s book is the one in which she reveals how positive thinking gained a foothold in the corporate world. She charts the shift from management as a dull, quasi-scientific discipline to the new messianic, anti-rational brand of leadership, in which business leaders are pumped up with confidence in their own ability to take the right decision based on hunches and intuitions. She quotes business guru Tom Peters in the 1990s: “Things are moving too fast for us to sort out logically what’s going on.” And in that atmosphere of ebullient self-confidence, Ehrenreich argues, were sown the seeds of the financial meltdown. Anyone who was critical or unable to “get with the plan”, was got rid of, until there were no canaries left in the mine."

http://mondediplo.com/2010/02/11wishing

I also found the chapter on the ramifications on health care to be enlightening.