All the way back to the Egyptian empire pharoahs lived a long healthy life. Its thefact of having money for the best food and health. Heck just go back to the 30's when social security came about, 60 or somewhere around there was the average lifespan and during that time most people worked up until thier death. So social security was to get the old people out of work to let the young ones have a chance. Heck not like most of them would be getting a check for more than 2 years.

I'm sure there are some kings from those days who would not even want to go back to there kingdom if you gave em an apartment, a shower, hot water ans electricity. Even if they had to work a job of the peasants