Well, doesn't that just bring the problem a dimension up? [which
  is actually a good solution to many problems].

  You have an "I" agent which is "doing" (willing).

  You state that perhaps it is necessary to go "up a dimension"
  (like solving a maze by looking at the maze all at once rather
  than travelling through it - going from 2D to 3D view) - or in
  short, perhaps a Gods'-eye / birds-eye POV.

  there's lots of ways to go up a dimension from a nexus of "I
  will".

  But (what if) - that's it? Is it possible for an "I will" to
  stand alone?

  If not, as you ask, what's the agent? Who provides the will to
  create the I, or the I to create the will?

  Nice foray into the whole cause effect/effect cause thing. I
  love this area.