I had to upvote this as this is something I've been saying for years. The amount of things a college grad can do with a million dollars is vastly bigger than the choice an octogenarian has. A dollar simply doesn't have the same value to a young person and an old person. The potential of what you can do with your money greatly diminishes as you age and at some point money even becomes a non-factor. When you're pissing your diapers in an old people's home, what good is your retirement money?
I am not advocating recklessness with personal savings, but at a certain age you pass the point where you can reasonably enjoy money.