It is difficult to find any articles written on the plunge protection team, but there was an article written November 21, 2007 that references the PPT that is worth reading. This is the link to the article: http://www.bloomberg.com/apps/news?pid=20601109&sid=a3BygoB.ADZg&refer=h

Here is another quote for you to ponder as you question why the PPT was created:

I am confident that Ben Bernanke will live up to the promise he made Milton Friedman before his death that a market crash will never happen again! Indeed, Ronald Reagan made an equivalent proclamation after the crash of 1987 when he created the Plunge Protection Team - Executive Order 12631 (The Working Group on Financial Markets).