Nobody ever knew what the right size was. There was a valve that was opened to allow hiring. And another "bung" that could be unplugged to facilitate firing. Th

Nobody ever knew what the right size was. There was a valve that was opened to allow hiring. And another "bung" that could be unplugged to facilitate firing. The algorithm was to open the valve when times are good/money cheap/greed is good, and opened the bung in other times. Totally decoupled from how many people (and largely what sort of people) are required. AI has changed that mechanism.