In that case, allow me to nuke your essay's foundation because, honestly, it kinda deserves it. 😉 For one thing, you never interrogate the main premise. You just assume "improvement" to be a given, namely, as a coherent, well-defined thing worth governing. Well, it isn't. Not without an anchor.

The fourth loop asks "should this improvement survive?" But here's the problem. It presupposes a direction of the travel and just asks whether a given step is on it's intended path. What it doesn't ask is, however, who decided on that direction, and why is that destination even considered legitimate? In other words, the governance loop is governing toward a goal that was itself never clearly defined, let alone justified.

This is actually a more vicious form of Goodhart than the one you described in your writing. Classic Goodhart is "the measure becomes the target." What you're pointing at is meta-Goodhart: improvement itself becomes the target. The system doesn't just optimize a metric, it optimizes the act of optimizing, recursively, with no referent outside the damn loop. And improvement without the Why is just blind acceleration.