it does not have to be like this, but the "Major Parties"
don't want anything else because they can manipulate
pluralities so easily through their media ties.
imagine not having to "throw away your vote" on the
"lesser of two evils" while still being able to express your
relative approval of all candidates. oh, how i wish for an
electoral process in the U.S. that satisfies the
Criterion (i like
in particular). alas!
(you have my most sincere apologies for the lameness of
the provider hosting the linked pages.)