The end of liberty always starts with good intentions.

The Children’s Secretary set out £400million plans to put 20,000 problem families under 24-hour CCTV super-vision in their own homes.

They will be monitored to ensure that children attend school, go to bed on time and eat proper meals.

Private security guards will also be sent round to carry out home checks, while parents will be given help to combat drug and alcohol addiction.

Around 2,000 families have gone through these Family Intervention Projects so far.

But ministers want to target 20,000 more in the next two years, with each costing between £5,000 and £20,000 – a potential total bill of £400million. – Sin Bins for Worst Families