Andrew, these are your theories, right? Because they seem to have little relationship to reality or history. Neither Carter nor Clinton phased out or were about phase out the $1 bill, it should also be noted that previous to the Susan B coin there was the IKE coin.
They cost to much to produce is a relative term/idea. They cost next to nothing to produce, but their life is short. A coin effectively lasts forever,costs more to produce, but "saves" money over time (at least that is the idea). Regarding your ideas about the paper. This was maybe a valid concern 10-15 YEARS ago, however since that time all sorts of measures have been taken and bits added to different denominations to make such a thing impossible.