What about the idea that senior people design stuff but then hand it off to junior people to write and then coach them through the bug fixing and refinement? (Honest question; doesn't seem like there's much of this where I work and I'm considering trying to introduce it because it seems to me like a good way to leverage the senior folks' skills while also transferring them to more junior folks, but I'm wondering whether there is some kind of taboo against it or something else that I'm missing)