In short: Job protection for executive employees defeats the entire point of an executive that is accountable to the people. Major magistrate positions are subject to Senate approval before being vested authority, but they are appointed and serve at the behest of the president, who literally embodies the executive.
I am having trouble understanding the document. Where is it stated? I can not exactly follow your argument. I am not sure why being accountable to the people necessitates having not any job protection?
I would have expected this to be codified (What is accountability for a federal employee). I mean regulatory bodies should also be accountable but also shielded from political influence, right?
You’re looking for the Reduction in Force Act for federal protections.
For the second part: no, US government regulatory bodies are expressly political, down to their very existence. You likely intended “partisan”, but, one party is against them existing at all, so…
https://constitution.congress.gov/constitution/article-2/
In short: Job protection for executive employees defeats the entire point of an executive that is accountable to the people. Major magistrate positions are subject to Senate approval before being vested authority, but they are appointed and serve at the behest of the president, who literally embodies the executive.