The service of the Cabinet members to the government is that each cabinet member has elected in order to serve the President. They are put into the position in which they should protect the president and go with all his/her projects. They also need to gain the trust of the President in order for them to be elected.
Both Europe and Japan had a "cast system" you could say, where peasants worked the land that the nobles owned. (The Japanese had their own terms for the people, I just can't remember them.) During this time, Europe had knights and these Knights had a code called Chivalry. Over in Japan, there were Samurai with a very similar code which was called Bushido. Hope this helps.
D. He believed that wealthy individuals made the country as a whole wealthier.