Interesting to think of it as a leisure economy. Though I think if you get to a point where everything is passive and you aren't having to grind anymore then you are losing a bit of meaning and purpose, as you eluded to. That's not to say that we should only be doing work that is a grind and lacks joy, but the ideal is to find a good tension between something you love to do, yet perpetually challenges you to grow. That's not quite as difficult as trying to find the end of the rainbow, but it's close ;)
Thank you for your thoughts on this - upvoted