There is no white paper because the wiki is speaking in general terms.
One example is Meni's implementation of adding proof of stake
checkpoints.... One of the key words here is adding proof
of stake, NOT replacing proof of work entirely.

If you were meaning to say that replacing proof of work entirely
with proof of stake shouldn't even be considered (rather than
being in the category of "disputed"), then I would generally
agree, as it is too huge of a change.

And by the way, this is a perfect example.  Meni's idea sounds
appealing, but the core devs (and even Meni) dispute it being
implemented because they do not believe it will make bitcoin
more secure.