Redundancy is a different matter to firing for cause, and I definitely read 'firing' as meaning the latter.

I suspect the fact that some people in this thread read it the way I do, and others (I guess including you?) read 'firing' to include redundancy, is causing a fair amount of confusion / people talking past each other.

(I'm not claiming I'm right and you're wrong, btw, just observing a linguistic disconnect)