Oh please. The fact that a gang of paid of hacks sucking on the government tit all have the same vested interest in perpetrating a fraud is hardly incredible. This has kind of thing has been going on ever since the Wilson administration.
A conspiracy theory becomes less credible in proportion to the number of participants necessary to make the conspiracy work. That's why a conspiracy to kill President Kennedy consisting of Lee Harvey Oswald, Jack Ruby, at least one person high in the U.S. government, and no more than one or two others is believable, but a conspiracy to bring about one world government consisting of the entire membership of the Council on Foreign Relations, the Trilateral Commission, the staff of the Federal Reserve and World Bank, and the controlling interests of media corporations, big banks, and academia is not -- and yet even THAT pales beside what you're suggesting here.
And no, common motivation is NOT sufficient. You are alleging coordinated dishonesty on a massive scale. And that's setting aside the fact that your understanding of the motivations of most scientists is completely and amazingly ignorant.
What I see in this whole "climategate" nonsense is a fallback position, resorted to after it was necessary to give up on "the earth isn't really warming," "humans aren't responsible for it," and "it will be good for us." The only consistent theme in the entire denialist symphony is the purpose of it all: to protect the profits of the fossil-fuel industry.