Objectively, spending the money on covid research would be more beneficial than a particle collider. I don't see how anyone can even debate this. I know CERN doesn't specialise in that, but my question is why is our society so inefficient when it comes to spending money?
If you had 20 billion euros, you're telling me you can't buy anything else more productive for physicists to work on with it? It's 20 billion euros. You could buy a small country with that.