[fhars]

The problem here is that the most favoured hypothesis currently is "there is nothing there that can be discovered with any accelerator that can be built using less than 80% of the world's GDP over the next 50 years." And all the valuable "nothing" we currently find just supports the hypothesis and that there is no point in formulating additional hypotheses.

[bpye]

I'm curious, what are the experiments we could run if we had for example 80% of the world's GDP?

[adamsmith143]

Lots of Grand Unified Theory candidates become interesting at extremely high energy levels and many of them assume the various fundamental forces will merge. You can test these theories at sufficiently high energy levels.