Since Christians are “to live in the world but not OF the world” the topic of social responsibility is, in Christian hands, a matter of who you encounter in your daily walk. Jesus told the Pharisees to pay their taxes; he didn’t tell them (how to) set policy. As stated in another answer, Jewish culture (like most thriving cultures, one might note) nominally did a good job of caring for the indigent.
Now come two dozen politicians of the Blue stripe; a few on the bluer-than-thou end of the spectrum appear to advocate a policy of take it while it’s there, i.e. tax the rich to improve the lives of the rest. Since politicians don’t do much math, they don’t have a clue what that would do in practice. And “the rich”—i.e. ones with a lot to defend, have Bill Gates and Warren Buffet on one end of the scale and the Trilateralist Commission on the other end. Taken as a whole, those with assets are anxious not to see them disappear.
Bottom line, I recall a contest between two baby sisters, both verbal but not yet in kindergarten. One of them had a new purse, and the other said, “Don’t be selfish, give it to me.”
‘Nuf sed. Administering others’ wealth via plebiscite is not a workable idea.