Dawn, society should absolutely enable people with disabilities to live as fulfilling lives as possible, including paying for them to have children and supporting them in that.
I don't think it's right to confuse disability benefits with benefits that are paid to people who want to SAH when they could worth though, there is a massive difference between the two things.
Custardo, there is a massive contradiction in what you have just said.
Future generations are of course needed for future society, but human nature dictates that people with have children whether they are paid by the state for it or not.
We don't actually need people to have children they can't afford, because there are enough people who can afford it doing so.
Society should not need to even think about actively encouraging people to have mor children until we have full employment. Until then, an increasing population is part of the problem.