Should one claim to be a Christian and claim that the Bible is their light and salvation and should be taken absolutely literally, then they should practice the teachings in that book... some of which include how a Christian should take care of the least unfortunate among them.
i always thought those rules were aimed at individuals...and the ones that were aimed at a govt were aimed at the rulers of the theocratic rulers of isreal...i am not sure that is were we really want to be

Let all bitterness, and wrath, and anger, and clamour, and evil speaking, be put away from you, with all malice:And be ye kind one to another, tenderhearted, forgiving one another, even as Elohim for Yahushua the Messiah's sake hath forgiven you. Ephesians 4:31-32