I'm not in support of forced abortions but Ill play devils advocate here. 

Lets say mom has a baby and has no job or secure place to live.  Instead of giving mom these things (I have a *friend* who did exactly this and yes she was literally given an apartment to live in and a card to use for groceries)  take the kid away.  Throw it into our already screwed up foster care system or adopt it out and mom can have it back when she can show financial proof to care for the kid.  You want that kid?  Show it and make an effort.

Once people cant make money off of kids we would probably see a decline in unwed low income parents.

And yes - the foster system sucks but that is a whole other can of worms.