You are converting (like many of us do) something tangible - let's say money, to something less tangible, let's say happines. To simplify things it's like reducing a fraction where you focus on numerator and I am saying that denominator has a role in the overall result as well.
You can work on achieving the desired numerator or consider that reducing the denominator can result in increased "happines" too.
> You are converting (like many of us do) something tangible - let's say money, to something less tangible, let's say happines.
I'm converting in the other direction, which is a big difference. I'm saying first reach happiness, then take that amount of money to set your baseline.
My overall point is that there is an upper limit to that number, after which no lifestyle (barring crazy outliers like buying a yacht a week) would require you to keep working.