Did you really think through your argument? If the waste in enclosed in some concrete shell, two hundred meters deep inside bed rock, there won't really be any

Did you really think through your argument? If the waste in enclosed in some concrete shell, two hundred meters deep inside bed rock, there won't really be any on-going expenses after it has been deposited. Now one can argue about the method itself, if it's the right way to do it (I think it's a bit overkill), but what you are saying doesn't really make sense based on that argument. The plants themselves of course are expensive, storing the waste for long periods of time not so much.