I'm a bit skeptical of using majority survey response to determine "morality." After all, given a Bayesian probability problem, (the exact problem was patients with cancer tests, with a chance of returning a false positive,) most people will give the wrong answer, but we certainly don't want our computers to make this kind of error.

Morality may be the sort of thing that people are especially likely to get right. Specifically, morality may be a set of rules created, supported, and observed by virtually everyone. If so, then a majority survey response about morality may be much like a majority survey response about the rules of chess, restricted to avid chess players (i.e., that subset of the population which observes and supports the rules of chess as a nearly daily occurrence, just as virtually the whole of humanity observes and supports the rules of morality on a daily basis).

If you go to a chess tournament and ask the participants to demonstrate how the knight moves in chess, then (a) the vast majority will almost certainly give you the same answer, and (b) that answer will almost certainly be right.