[steve_gh]

My experience in across a range of technical and consulting roles has been that junior folk understand the need gor their work to be reviewed and checked, because they know that they are inexperienced. Good senior folk want their work to be checked because they are experienced enough to know that they are fallible. It is the mid level folks (especially those who are promoted above their competence to senior roles) who think that they are good enough not to need hheir work reviewing.

[Cacti]

This is my experience as well, but it’s usually not those promoted above their capability but those who were passed over and then grow resentful that end up causing the issue. An otherwise competent, but now bitter, middle aged guy on the third shift (or otherwise with less supervision than usual) who is going through a divorce or some other major life stress is the scenario I see most often. They fall behind, they come in to catch up, they have to leave unexpectedly for a family medical crisis, they fall further behind, and so on and so on and before you know it, a perfectly rational person is doing stuff like half-assing the QA checks and it seems almost normal.

But you’re right. It’s not the black belts you have to watch out for it, it’s the browns.