In modern society, beggars are generally not regarded with much respect. Among the religious and non-religious alike, we tend to frown upon begging. Get a job, we might say. Beggars might even present a threat to us, because what if begging turns to mugging?
I've talked before to Christians about giving money/food to beggars. In my experience, most Christians are supportive of giving food to beggars, but not money. What if they use it for drugs/sex/alcohol, etc? I've also had Christians say that even food should be given discriminately, because many beggars are just lazy and would rather sit and beg than go get a job. I've heard this said in specific reference to "familiar" beggars at sporting events, the local intersection, etc.
I've made the argument that, as Christians, we are not instructed to discriminate in that way. The Bible doesn't say "Give to the poor as long as you think they'll use your charity wisely." It just says give.
I wanted to reassert this point with one of the most widely attested sayings attributed to Jesus in the entire canon of Christian literature. I'll provide the saying in all its various forms among the texts that attest it.
Shepherd of Hermas (circa 100 C.E.) - Do good, and of all your toil which God gives you, give in simplicity to all who need, not doubting to whom you shall give and to whom not: give to all, for to all God wishes gifts to be made of his own bounties.
Luke (circa 90 C.E.) - Give to everyone who begs from you; and if anyone takes away your goods, do not ask for them again.
Matthew (circa 85 C.E.) - Give to everyone who begs from you, and do not refuse anyone who wants to borrow from you.
Gospel of Thomas (circa 60 C.E.) - Jesus said, "If you have money, do not lend it at interest. Rather, give it to someone from whom you will not get it back.
Didache/Teaching of the Twelve Apostles (circa 50 C.E.) - If someone takes from you your goods, do not reclaim them, for you are not able to do so; give to every person who asks anything of you and do not make any counter-demands.
The dates of those texts, of course, are up for debate, but one thing most scholars agree on is that they are all independent of one another. Luke and Matthew's version came from the Q Gospel - an otherwise non-extant source that is imbedded in those two texts; the Q Gospel, Gospel of Thomas, and Didache all drew the saying from the Common Sayings Tradition, which is the earliest oral tradition of Jesus' teachings, going back to the very earliest days of Christianity. The Shepherd of Hermas also probably comes from oral tradition, though it may have used Matthew and/or Luke.
It is for this reason that most Jesus scholars affirm very strongly that this teaching - to give indiscriminately and without expecting anything in return, most definitely goes back to Jesus himself.
Considering that, should we - as Christians - not take it very seriously, and stop giving discriminately to only those poor who we think deserve it and/or will use it wisely?