For the math & economic Geeks,
Maybe this has already been figured out...
How much life force does it take to make a billion dollars.
The only parameters would be the people who show up to their 8 to 5 job.
How the billion is made, the many ways they have done it, from invention to theft can be plugged into the formula that is created with the first model used.
Consider it a per lifespan cost,
it represents the sum or value of our lives spent on the planet.
It can be used for many things, please take this challenge as a chance to change the way people perceive their lives and take no compensation for it as i have by asking the question, yes, pay it forward :)