If they cared about measurable outcomes we wouldn't be in this situation.

For them, "success" involves feeling that a particular social arrangement has been solidified. It involves an exploitative hierarchy (which they believe is both inevitable and required) where they aren't obviously on the bottom and where "the right people" are on top.

They simply do not care how much it costs to raid people's attics looking for Anne Franco, or even the odds of finding her family, as long as The Authority is taking Firm Steps and people like Anne Franco are afraid.