AI pattern recognizers are effective at getting a good chance of recognizing many significant phenomena. Fraudulent welfare claims is one of them. But humans accused of any sort of wrongdoing deserve a real investigation.

It is inherently unjust to punish someone because a program reported perse's actions "resemble crime."

We must keep in mind that the UK's welfare system is designed to be cruel; it reduces unemployed and disabled people to a point where they can't actually get by, and imposes impossible requirements. Whatever system of enforcement of those requirements the state happens to use is a means to a horrible end.