Sadly, Social workers etc are only allowed to do so much within points of law.
I worked for an agency looking after vulnerable people. When a crisis was taking place, phoning their social worker did not immediately produce results as their worker was invariably out on another errand. I've seen the diaries they all carry, bulging with post it notes, knowing they have to rush from one case conference to another.
I agree, we need another and better system but I reckon without a bigger push than a knee jerk reaction that inevitably fades away until the next sad case, we ain't going to see any improvement.