You define the problem well. I agree that we should pay for public goods, and the game theoretical value is above 0, and we can find the equilibrium value that we should pay.

It's also important to have a way if I have excess money to retroactively pay back people who contributed to the technological advances of the past, so I'm glad you're thinking about this.

How do we address the free-rider problem, where person A thinks public goods should be funded, but is happy to keep their money to themselves and let person B pay for it?