So it hasn't been done before since scale is key here where toy solutions to coordination problems fail
There's nothing stopping the idea from scaling.
Really!? A good idea .. just scales? Is that how you view the world?
A good idea is nothing without good execution. And execution requires patience, coordination, a good amount of luck .. and so much ideas.
It is like what they say - Ideas are infinite. Nobody cares about them.
https://power2people.org/projects/overview/