It's strange, but there does seem to be a culture around cheating the government through mass-reproduction and claiming all these faux mental issues (ADD? Seriously, they're kids; they'll be energetic!), which is passed down, more often than not, to the children of these women.
This is a cancer in society that ought to be cut out quickly, though as long as there are people that genuinely deserve help, there will be people faking injury to live free and lazy. It seems the only ways to stop this abuse are to shut the system down or change the way claims are evaluated.