Maybe the point didn't come out quite right. Anyway, I'm just trying to say that you have to have a license of some form to do a LOT of things in life here in the US, but yet if you want to have 15 kids, regardless of your lifestyle, living conditions, intentions, etc, you can do so without a second thought.
In my opinion, (and this is actually kind of touchy for hopefully reasons i don't have to explain), you should have to apply for a permit to even attempt to have children. In that permit or license, you have to prove at bare minimum the ability to provide for the child. Criminal record should be taken into account. previous sex offenders are flat out disallowed the right to have children in my opinion (another touchy subject that i'm sure someone will jump all over) and if you fail a psyche evaluation, you shouldn't be allowed to procreate.
Now, this won't solve all of the problems with ****ed up parents like these two, but it surely would turn back the clock a tad and might foil some people's intentions as well as hopefully protect possible future births and lives from being subject to an upbringing like the one shown in the first post.