A terrific plan, but it's not gonna happen until the current crop of folks who control energy are dead, and probably not until several generations of their descendants have been diddled by the dude with the scythe.

Altruism has left the building.

Solar zealots always conveniently ignore the simple fact tht solar energy, in its current technological state is not even close to being a viable solution. The most efficient solar collectors ever made, over the course of their entire usable lifespan, will only produce about 70% of the energy required to build them in the first place. Do the math.

There is a big ocean out there.