Because there's huge demand for the services it provides (which are mostly providing contraception and STD screening), and because it would cost at least a thousand times more to fund the hordes of unwanted babies which would otherwise be born. I wish there was a less political organization providing these services -- PP promotes socialism almost as heavily as it promotes birth control -- but other than PP, there are only scattered local organizations that provide these services, and a lot of those are also fond of serving up socialist ideology along with medical services.
Would you rather those babies be dead?
According to Charmaine Crouse Yoest in Policy Review,"For many years now, only 1 to 2 percent of women faced with unwanted pregnancies have made adoption plans. At the same time, the number of couples waiting to adopt is usually estimated at around 2 million." So speaking of "unwanted babies" is highly inaccurate, since every baby born is wanted by somebody. And in this country, it is very common for prospective adoptive parents to pay the birthmother for the costs associated with pregnancy and childbirth.
Your objection that the government would have to pay for "hordes of unwanted babies" is untrue, and also shockingly demeaning to the human dignity of the babies in question.
What a sick excuse..........explain yourself governmentshrinker.