I used to work in a CP team. May of the comments here I agree with totally - lack of resources, pressure to record rather than 'do', management making decisions based on budgets, not need.
Lots of cases stick in my mind. One (about 10 yrs ago now) was a family of nine children, three bed house. Police visit on a stolen goods enquiry re the step dad. Find one room in the house rammed with expensive electronic gear, three shelves of fridge with lots of food. Rest of the house a tip. Children don't even have their own beds, let alone sheets on the bed. They sleep where there is a space. Youngest one had a cot - mattress soaked with wee. Clothes were whatever they could find - no wardrobes/drawers. Dog poo in several rooms. One shelf of fridge was the kids' - had some margarine and tomato sauce on it. Older kids were expected to feed the younger ones. They ate tinned tomatoes on toast for dinner several nights a week. Stepdad and mum got chips from the chippy. Mum was pg with tenth child (trying for another boy) and spent time meeting her partner's needs, not her childrens'.
Police stepped in and got Police Protection - removed the children. Cue heated exchange with the LA who basically said conditions were crap, but not that bad. Eventually, an ICO was reluctantly obtained by the LA. The children were in foscter care for four months, while the house was sorted and the parents offered support. The children thrived in their foster placements (they went in groups of three). They were amazed and proud they each had their own set of PJ's and a toothbruah, and had clothes that fit, folded in a drawer, and weren't teased at school for smelling of wee and having no coat.
After four months (which cost the LA a lot as there were nine of them), they were returned home. Support was in place, but basically, everything slid again once they were off the CPR, and this time they were left to rot. the LA didn't want to provide too much support as it was so costly. The step dad kept his nose clean, so no police visit. Teachers reported usual problems - coming to school without sufficent clothes, very tired/hungry. Neighbours used to contact us with reports of neglect, but the view from management was 'yes we know about them, but we can't do anything about it'. (very quiet from HV btw - never knew why, although mum was very good at lying, and no time for home visits).
Those children were in effect abandoned by social services, and a number have since grown up and had children of their own already (starting at around 15 yrs of age), and so the cycle begins again. So many things were wrong for this to have happened, but it did, and cotinues to do so. I used to think - leave SW's alone, and let them get on with the job. Now I do wonder if there does need to be a major overhaul - where complacency is just not acceptable.
Sorry - rant over. This kind of thread inspires rants doesn't it?