Come on now, don't cop out. Explain why the schools are accountable for these people. Don't handwave the issue away.
Guffaw. You'll notice I didn't blame the schools. I blamed federal meddling in the schools, which can't help but degrade them.
Are you seriously suggesting that a better education would not help people to grow into useful adults? Do you not think that better schooling would result in more prosperous citizens, thereby reducing poverty, and its associated ills?
And like I said, big picture. It's only one small part of what's wrong. I could just as easily have blamed government regulations (prosperity again), a culture that fails to properly disincentive fornication or drug use, and a hundred other things.
Oh, and since you're demanding an answer to your question, I will demand a response to my points below.
Have you asked any private charities?
How many private charities has she already been through, wore out, lied to, cheated, and turned against her?
"As a society, we are not willing to let her die in the streets."
In that case, we can shut down all the .gov organizations, and let her be cared for by whoever steps in.