I think Bush sees his role as taking all the hits with the GOP base with unpopular issues and enabling the 2008 GOP successor to run free of the wedge issues.
For example, Bush can support a guest worker program and raise the minimum wage , thus freeing Rudy, McCain, & Mitt from having to make definite stands on these issues.
Oh, I believe you are right. I just think it is a mistake.
People are getting really ticked off at the GOP right now, for several reasons.