It is absolutely solvable.
We saw it solved, momentarily when the first 4Tn stimulus was issued in US.
Oil prices went negative, and the environment made a brief spike of recovery, whilst the dollar itself even went up in value.
Just for an instant, we got a glimpse of a non profit world, a world of all things donated.
What was missing was the will to sustain it.
The banks, conventional money hoarders, and profiteers were horrified, because they almost lost control, but we saw it, those of us who knew where to look.
Monetise sunlight, by proof of work tokens, freely issue those, and all is solved. There, is the infinite source of infinitely valuable money.
It is happening by Bitcoin, though the profiteers will always try to argue the opposite, we just need to look to see it.
What money could be more valuable than the money that saves the Earth?
Like you said, seeing is believing, and we did see it.