We are living in the former United States of America in the Age of ophra, and zero. And in the words of the great Prophet,Dr. Phil, get real. ;0)
No matter how you look at this situation there is a negative outcome in which someone is punished for irresponsible behavior. We can keep things as they currently are in which the taxpayers are left holding the proverbial bag to financially support her brood. We can cut off her financial support completely, in which case the people punished will be her own children or we can prevent her from having more children that will undoubtedly be placed in the public charge. To me the third option is the fairest because it places responsibility on the individuals reprehensible behavior.