I think you are missing something fundamental from your analysis, which only considers Earth as isolated.
It isn't Isolated, it is powered by the sun.
All life on Earth was adequately powered by the sun until we came along.
We work exclusively from the energy of Earth as if the sun doesn't exist.
It is the grand donor of all energy, and we ignore that, thinking we create our own energy, always at profit of course.
By that we undo everything created by the energy of the sun.
So we must also become powered by the sun.
The first step towards that is acceptance that the only valid money has to come from the energy of the sun.
After that it doesn't matter how much "leaks", because the input energy is infinite, infinitely scaleable, clean, and donated for free to all people.