I would imagine that your "more lines" approach does manage to select for those who meet targets for the right reasons over those who decontextualise everything and "just" meet the targets? The people in the latter camp would be inclined to (try to) move goalposts once they've established themselves - made harder by having the conflicting success criteria with the narrow runway to success.
In other words, good ideas and thanks for the reply (length is no problem!). I do however think that this is all idealised and not happening enough in the real world - much agreed re: psychopathy etc.
If you wouldn't mind running some training courses in a few key megacorporations, that might make a really big difference to the world!