Limiting these circumstances would be good, but only if we are teaching them to catch their own fish. Right now we are teaching people its okay to be on welfare for an extended duration of time just because they are in need for whatever the reason. If you fall, welfare should be a pick me up til you get back going again, but for way too many its a career path.
Kids dont have a choice or the means. We as a society need to feed, educate and keep them healthy in hopes of breaking the cycle.
Freedom and liberty have nothing to do with handouts. You aren't entitled to free shit.
If you are unable to care for yourself, why continue the downward spiral by having children?
I'd pay willing parties a lump sum for their ability to reproduce as part of our welfare program. Its a win for them and for society in the long run.