Or, "Buddy, can you buy a book?" Jonathan Bernstein, on why the grifter ain't going away...
Remember, you need an enormous number of votes to be elected President of the United States, and quite a few votes to be nominated for that office. But you can make a very good living off of a fairly small number of dupes, as long as they're rich enough and willing to keep shelling out for every new product you come up with.
So all in all I'm not really sure where Newt's incentives lie, other than to say that I'm quite certain that he really, really knows his marks and what works with them.