(This question was inspired by my comment on this question - Are you allowed to save a non-Jew's life on shabbos? (The comment is quoted at the bottom of my question.))
R. Simeon b. Menassia is quoted in Tractate Yoma 85b (Babylonian Talmud) as saying that it is better to desecrate one shabbat to save a Jew's life in order that s/he may live one more week in order to observe shabbat again.
I am seeking to determine whether or not this statement of R. Simeon applies even to Jews who are not sabbath-observers.
(My question had gone by unanswered in that comment thread, so that is why I am asking it as a question here.)