Eh, I would say investment into R&D should be encouraged and maybe allow tax write offs. Even of the end goal is a private power source. Once that R&D turns into workable, operable, sellable products, then tax the fuck out of them. Perhaps disallow making things that can be a boon to public infrastructure from being deem proprietary, so that it can be more easily adapted to public use.
I dunno, I’m typing from my couch after a few beers.