Rare is the politician who serves his term of office and then quietly goes home to retire. The popular example from ancient history is of Cincinnatus retiring after serving the citizens of Rome. With enemies attacking their borders, he was drafted and appointed by the Roman senate to be dictator, and, by exercising a little muscle, surely could have remained in that job until he died. After the danger passed, though, he resigned to go home and till his fields again.
George Washington's tenure as president could have been a lifetime job, too. He was the hero of the infant country, had the support he needed, and could have had himself crowned king, but he served his term and went home to Mount Vernon. (Some folks still liked the idea of having a king.) His act of resigning the job established the concept of limited terms, the wartime presidency of FDR being the exception.
Ulysses S. Grant lived quite destitute until he published his autobiography, the last of which he wrote on his deathbed. It was only through the income from sales of that book that his widow had something to live on. His book, by the way, is considered very highly as one of the best autobiographies ever written.
Harry Truman was a member of the club. He could have carved out a moneymaking career after his term but chose to go home to Independence,MO and live a modest, quiet life. At the time he didn't have a presidential pension; that perk had not been passed into law yet.
I don't know if there are other worthy examples. Contemporary politicians seem to be wealthy before they run for office or rub shoulders with the elite after the fact to make their bundle then. It's refreshing to see the Obama-Biden ticket, both came from humble backgrounds and neither is rich. Biden has been around a long while and never connected with the influence peddlers (His reported net worth is less than $200,000.) Obama's service work has not landed him in the rarefied air of wealth either.
