>isn't going to break the bank
It really does. If you remove the free insurance and let the plants shoulder the full cost it renders an already extremely expensive enterprise completely financially unviable. Thats why governments gave liability indemnification to plants in the first place.
The $800 billion is about more than cleanup costs, fwiw. It also includes stuff like turning on coal power plants to replace the power produced by the dead reactor. It wasnt Japan "overreacting".
All of this has happened before and it will happen again and because appropriately priced insurance WOULD break the bank taxpayers will be on the hook next time. Again.
The latest nuclear bill in America focused entirely on extending the legal lifetime of existing nuclear power plants. Good thing Fukushima's demise wasn't about its age, eh?