Jill misses the prestige. The importance. The people constantly waiting on them. She wants back in.
The office of the presidency and vice presidency are as close as we get to Royalty in America. In many ways, we exceed the fanfare and material value compared to what the English do.
This happens due to us being a larger country with more money. That sustained level of Royal Treatment is intoxicating to many.
Nancy Reagan was also a lover of the high life. I think she too was the driving force on why Reagan even pursued the presidency at all. Nancy was said to look down upon Barbara Bush, since Barbara wore plainer clothing and was never really glamorous.
There is never enough money just ask the Clintons and Obamas.