I think this thread is more or less done, but I always like the last word(!) This thing about whether people love their children or not - I think there are people who aren't capable of offering unconditional love to their children, but that's because they never received it (nor anything like it) and can only pass on the "model" of parenting that they had.
I firmly believe that we can only pass on what we ourselves have received, and this is so clearly seen in parenting. There will be exceptions of course, but in the main we parent in much the same way that we were parented, and for those of us that were fortunate enough to receive the unconditional love and care that a child needs to thrive, we fail to understand how it is that all parents can't love and care for their children in a proper manner.
Duchesse I think you are somewhat unenlightened about the workload that social workers are struggling with, up to 30 cases at a time, and many of those child protection cases, or those at risk of ill treatment. I mention this as you state that some categories of parents should never be out of the sight of social services. There is a civil liberties issue and perhaps more pertinently where on earth is the time going to come from to keep "in sight" all these families. Social workers cannot cope with their statutory responsibilities in the arena of child protection, and since this govt swung the axe at budgets, there is a real crisis.
Who is going to staff this "overarching parenting advice centre" I wonder and what would be their remit. It would have to volunteers as there is no funding for any such thing as far as I am aware. I'm sorry to say that I find some of your ideas somewhat simplistic.
Also social workers do not have a "right of entry" into people's homes. If referrals are received about possible abuse or neglect of a child/ren then sws will visit, and sometimes have to work hard to get a relationship going with the parents so that the door is "left open" as it were. It's a very finely balanced thing, and takes great expertise. I don't think many people have any idea of the difficulties and stresses of working in child protection and judging when the children are in danger.
I would like to dispel one myth social workers are not allowed to remove a child/ren from their parents and so many people think that they have this power. It is only courts that have this power, and social workers know that they must able to evidence that the child is suffering from significant harm before they request that the Court make an Order for the child to be removed.