m0llusk parent
It might be worth considering just how much other physics could be done with these resources. Improve education and experimentation for many other investigations instead. There is still much to learn about fluid dynamics, the chemistry of water, alternative plastics, and many other open questions. The vast amounts of resources poured into exotic reactors could educate many more physicists, launch many more satellites, and operate many more laboratories. Moving forward with very large projects may effectively starve out other investigations that might ultimately have far more practical applications. In some ways this proposal seems more like a lack of imagination than a positive surplus of imagination.
I'd say that the "missing" neutrino mass term and the identity of the dark matter particle (quite likely a neutrino) are two of the most interesting problems in physics and I'm afraid that Team LHC's interest in (I think boring) Higgs and Top factories could crowd out investment in the much more interesting area of neutrino physics the way that you say.
The good news is that going down the muon accelerator route you probably need to build a neutrino factory to validate the technology long before you can build those other things.
That's all true, but they wouldn't spend the money on those kinds of things, they'd just buy more fighter jets.