I recently read a book called Satisfaction by psychiatrist and neuro- scientist Gregory Berns. He posits that satisfaction, which is related to but not identical with happiness, is caused by stimulation in the striatum of the brain. In life as in the laboratory, much of this satisfying stimulation seems to be caused by novelty.
Don't know how this might reconcile with married people being happier than unmarrieds, unless they are stoking somebody’s furnace elsewhere. But I can easily see how money makes it easier to gain novelty in day to day life. Provided you use it to gain novelty, rather than waste it on more stuff, to which you quickly become habituated.
If retired people have the money and wit to seek novelty, they should get more satisfaction than a run of the mill worker, but perhaps not more than a scientist or a trail lawyer or maybe a detective. OTOH, if a retiree watches a lot of TV and turns into a turnip, he probably is not going to feel particularly satisfied.
Ha