I agree that de-rating is an important concept that does not get enough attention and you've covered it well. I would like to clarify a couple items: "electrolytic capacitors cannot be used to couple AC signals" This is not entirely accurate. I think what you are trying to say is that...
Why can't China copy accoutability from the west? The west is a big place. If you are refirring to the US politicians there is very little accountability. They allow themselves to do insider trading. Conflict of interest is not in the American language. They do just about what they like...