I think they need goal of at least one 80amp destination charger at every 100 miles on every major road in america. That would make me happy and it wouldn't cost too much. Even just adding a few HPWC at the superchargers stations for people that are just topping or as an overflow off would help alot too.
If you add up all the costs, adding a supercharger shouldn't cost significantly more. It's basically the capital cost difference between an HPWC and the supercharger hardware, which is some fraction of the total cost for a given location. If the power company needs to trench or add poles for the new service, you're already looking at ten's of thousands for your HPWC.