Something switches in your head at that moment that you realize you no longer NEED to work. Now you GET to work. When you take that "need" away, every thing you do is because you love it. When you love it, people, whether its clients or management, can see that value you add and you can receive compensation for it. I know plenty of people who went on to be make more money in retirement because the did something they were passionate about. Sure there are people who did a **** poor job of planning for retirement or had some sort of extenuating circumstances that lead to them NEEDING to work in "retirement" but many move on to other callings. I for one (in my mid 30's) have a hard time visioning a complete retirement. Why would I? I LOVE my career and there is no need for me to ever leave it. I in no way would work 50 hour weeks but would still work in some capacity. I have the freedoms to continue my hobbies and family life as I so choose.
This right here...I love what I do. I'm sure even after I hit retirement age, I'll still do it as a consultant so I can work part time doing something I love in an industry I love AND still get paid for it.
I mean..if you're participating in something, and you feel like you add value...AND you get to be paid for it? Win-Win right?