Openright: the public's right to buy a copyright from an author

I've been trying to think of an elevator pitch for this. "Kickstarter for copyright" is close, but it loses the sense of responsibility that copyright owners should have to the public (due to the costs their work imposes on society).

Also, as far as logistically, Openright can be implemented publicly or privately. I think the private route would be the way in which it could be tested. If (when?) proven as a "socially responsible" way to sell infinite goods among communities that care about this sort of thing, it would then make sense to convert it to a public implementation (write a law).