> For nuclear power the public is on the hook for cleanup fees from hundreds of billions to trillions of dollars and the large scale accidents we have seen caused hundreds of thousands to get evacuated.
How much expense is justified for each life (or year of life) saved from radiation exposure by scraping up the soil and bagging it? Can we justify the evacuation of elderly from close to Fukushima on the grounds that in 20 years time they will have an elevated risk of cancer? How is that balanced with deaths caused by the process of relocation? What about the human cost of an energy shortage caused by shutting down the nuclear power stations in Japan?
The same goes for chemical cleanup (heavy metal poisoning, pesticides, dioxins, PFAs, fly-ash, asbestos).
To make the cleanup decisions we need some notion of tradeoff between cost and benefit. Otherwise we'll end up in a situation where an indeterminate amount of money can be spent on something with no benefit (other than achieving something a politician willed to happen).