Perhaps it is reasonable to allow the money to remain unspent on topics related to physics! Spending has opportunity costs, after all; if these other experiments are not really the measure of the cost, then something else of value to society surely is.
The direct scientific value may be limited; the spinoff of that much attention / funding isn't.
Not saying we should definitely fund a new collider. But the amount of effort needed is so huge, that even just the discussion will have positive impact for science.
This might not count as it's not a single 'official scientific experiment or tool', but I think that biosci is clearly getting heavily funded.
Big Science and Big Politics in the United States: Reflections on the Death of the SSC and the Life of the Human Genome Project (1997) is a classic in history of science analyzing this competition.
Research into virology seems a bigger thing to research. There is way more "parallelism" there meaning funding could be allocated more efficiently nin some given time frame.