At least we are all debating this because we all actually give a shit. That says a lot right there.
IJC, seriously, if you have ideas and the enthusiasm and the energy, you should go into physics, refine your ideas and maybe someday you'll have a breakthrough that adds to the general knowledge of humanity.
Anyway, two words: General Research.
The beauty of general research is that what seems irrelevant today may be important tomorrow. What if the LHC does lead to a breakthrough in the energy crisis? If we are to find new sources of energy, it will be in the realm of quantum physics. Everything is connected to everything else. Chemistry doesn't live confined in a box unto itself. Neither does medicine, nor biology, nor physics. Hence the importance of increasing our general understanding of everything. It's long-term thinking. General research leads to major discoveries. Think of cancer research. Some people whine and complain about scientists spending all this money on tinkering with genetics, yet if the many varieties of cancer are to ever to be cured, it will be when we have a way of finding specific types of mutated rogue cells and either fixing them or killing them. Long-term thinking, not short-term, feel-good solutions. Leave that to the scientists working at corporate labs finding better ways of leeching oil from the ground or better chemicals to refine trees into paper products or improving drugs that mask symptom x.
And please, the LHC is chump change--and come on this money doesn't all of it just disappear into an invisible box never to come out again, a good chunk of it goes to tradesmen, laborers, scientists, researchers etc etc who will be working somewhere anyway and feeding their families... and then they get taxed on it which goes into society, or they spend it (or perhaps even donate some of it as the educated often do) and then it goes straight back into the economy or wherever else.
The problems of the starving on this planet can't be fixed with money anyway. The food is already more than enough there. The money and resources are already there. Try sending food and resources to the starving and watch the military take it all away. Buy some chocolate, buy some clothes, buy a computer, help corporations exploit the poor. Refuse to buy those products, the poor lose their measly jobs and starve. The problem on this planet is ignorant, power-hungry people and lazy people, exportation of locally needed resources, and far, far too much waste. The solutions are complex. Shall we feed the North Korean masses who are living on bits of rice per day? If we tried to liberate North Korea would things change overnight? Of course not, because the starving masses have been brainwashed into worshiping their government and will fight and die for it while Kim Jong-Il laughs it up and drinks his favorite bottle of Hennesy (of which he is a renowned fan). Complex problems. I do believe we as human have the capability of bettering ourselves and that we might even do just that, it's what allows me to get out of bed in the morning and face the day.