Perhaps you don't know very many people in the UK? David Cameron's coalition partners in the last government were considerably more socialist than David Cameron's own right wing party, yet they were the ones putting the brakes on this kind of State overreach and they were the ones try to protect the privacy of the people. You've clearly got some misplaced biases against socialism and considerable ignorance about the UK.
Also, stop and think about the suggestion of assigning a caseworker to every child... does that sound like something the UK could afford, and if they did do it, just what kind things would they be able to achieve given the current budget conditions? Sounds like a nonsense to me.
I live in the UK BTW.