Your desire is legitimate, it's your solution to the problem which is Communist in nature. Our three branches of government have no business whatsoever in ordering, or even requesting, that a man or woman stop giving birth because of their social or financial status. This is an abuse which expands government powers to an unconscionable level of excess.
Part of the answer to this problem lies in restricting the powers of government, (which is the principle that our Constitution embodies). It is the overreaching hand of government that has established the welfare state and the so-called "family services" agencies that defraud the taxpayers to finance their intrusive operations. Government has also been instrumental in limiting the power and expression of religion, and religion needs to be strong because it has traditionally been the faith based organizations that help the needy, the poor, the downtrodden. This way you help the drug addicted woman's child only on a voluntary basis, (and there is a far better chance she will get the proper spiritual guidance and help to kick her babit from the priest/minister and Church community than from some government hack). I think President Bush is right on the mark with the promotion of his faith-based programs.