The more important question is, are you content with simply dismantling any progress in accelerator science at all for the next century? Because the LHCs successors won't be online till the 2050s at least. If you don't fund them now though and start the work, then no one does the work, no one studies the previous work (because there's no more grant money in it) and the next generation of accelerator engineers and physcists doesn't get trained and the knowledge and skill base withers and literally dies.

Because the trade off of no new accelerators is the definite end of accelerator science for several generations.