The following is from http://www.salon.com/2015/09/26/how_to_explain_the_kgbs_amaz... and describes the way the Russians implemented SELECT * WHERE CIA FROM EMBASSY_EMPLOYEES: "differences in the way agency officers undercover as diplomats were treated from genuine foreign service officers (FSOs). The pay scale at entry was much higher for a CIA officer; after three to four years abroad a genuine FSO could return home, whereas an agency employee could not; real FSOs had to be recruited between the ages of 21 and 31, whereas this did not apply to an agency officer; only real FSOs had to attend the Institute of Foreign Service for three months before entering the service; naturalized Americans could not become FSOs for at least nine years but they could become agency employees; when agency officers returned home, they did not normally appear in State Department listings; should they appear they were classified as research and planning, research and intelligence, consular or chancery for security affairs; unlike FSOs, agency officers could change their place of work for no apparent reason; their published biographies contained obvious gaps; agency officers could be relocated within the country to which they were posted, FSOs were not; agency officers usually had more than one working foreign language; their cover was usually as a “political” or “consular” official (often vice-consul); internal embassy reorganizations usually left agency personnel untouched, whether their rank, their office space or their telephones; their offices were located in restricted zones within the embassy; they would appear on the streets during the working day using public telephone boxes; they would arrange meetings for the evening, out of town, usually around 7.30 p.m. or 8.00 p.m.; and whereas FSOs had to observe strict rules about attending dinner, agency officers could come and go as they pleased." I read the book. When a CIA agent's cover was blown, the CIA had a spare care and apartment and the agent's replacement needed just that, so they tended to reuse the car and apartment. And wondered why the replacement was then identified so quickly.
So. After that long digression, here comes a hypothesis: Organisations that can keep their mistakes secret, can make themselves seem much more capable than other, similarly large organisations.