Makes sense. You can be quite comfortable on 75K annually. I for one am certainly not jealous of some old ugly billionaire. I would rather be young and not have a billion dollars. Money certainly relates to happiness though but the law of diminishing returns makes sense to be applicable here.
x2 except for the dollar amount. In California I'd put the figure at $150,000. I, too, would rather be young than have a billion dollars. With age comes illness and other physical restrictions that you cannot begin to imagine when you are young. When you're 25 your body just works the way it is supposed to. That begins to change after 35-40. You'll see . . .

In addition, happiness is related to personality type. If you are "happy" (whatever that means) with a modest amount of money, then you will be happy with a lot more money. If you are unhappy, cynical, easy to anger, etc. with little money, you will be the same with a lot of money. I once read in a comic book that "powers" don't
make a superhero; they augment you. That is to say, super powers make you more of what you already are. I think the same is true of money.