These kinds of vague rumours ("they have evidence" is weasel words) are used to legitimize the development of invasive programs (and software) that profile peop

These kinds of vague rumours ("they have evidence" is weasel words) are used to legitimize the development of invasive programs (and software) that profile people; see for example https://en.wikipedia.org/wiki/Dutch_childcare_benefits_scandal https://en.wikipedia.org/wiki/Dutch_childcare_benefits_scand... that affected tens of thousands of people (causing children to be removed from their parents, divorces, suicides, etc), mostly justified because of a small group of people defrauding the benefits scheme. The total cost of setting this right is in the billions and increasing, many times more than whatever they saved on fraud.