You do indeed raise an interesting point. The spams really do hold to account quite drastically any officers who screw up through negligence - dismissal with loss of pension is not unusual. Another example was the
USMC F/A18D crash at Miramar in 2008 - IIRC the engineering officer who signed off the plane was dismissed with loss of pension, and the officer who ordered the pilot to return to Miramar (rather than eject) was also "relieved" of his duties.
The RAF seem less inclined to hold their officers to account - for example the Wing Commander who wrote off a Hawk at Cranwell after he forgot to lower the undercarriage was even allowed to return to flying duties. And after the Typhoon crashed at China Lake, an RAF insider even glibly told a national newspaper that
"these things happen from time to time" .