Insofar as a conspiracy is just two or more people planning something in private, of course they exist. As far as the wealthy and powerful that meet at places like the Bilderberg and Bohemian Grove, I have no doubt that they get together and make speeches and discuss global economic and geopolitical issues and propose ways of dealing with them. I guess I don't see why this is necessarily a sinister thing (unless you unquestioningly accept everything AJ says, which I don't).
The reality is, there are issues currently and on the horizon - overpopulation, resource scarcity, environmental degradation, nuclear conflict, to name a few - that are potentially catastrophic to civilization. Human beings, in general, tend to act in ways that serve their own interests, rather than the interests of the whole. The problem is, if everyone keeps doing this, in the end we'll all suffer for it. Picture a ship sailing through a field of icebergs. You'd want someone at the helm, wouldn't you? Otherwise we're just sailing blind. The question is, can you trust the people at the wheel? Alex Jones and his ilk obviously don't. I'm not convinced.
I'll tell you what I think, if you care to listen. I think the powerful elite - the Bilderbergers et al - are not a group with a singular mind. I think most all of them have their own interests. At the same time, I think they realize that there are serious problems facing the world, and if they don't take steps to deal with those problems, no one will. The methods they use may be questionable, may be morally objectionable even, but may be seen as necessary. Without knowing what they might know, how can you say what is justified or not? If lives or freedoms or quality of life are sacrificed, but civilization is ultimately saved from another dark ages - or worse - is it worth it?
I don't think these people with the power are Luciferians Hell-bent on totalitarian world-domination, subjugating the Earth's population, turning all of us into slaves totally beholden to their will. On the other hand, I think they are interested in promoting cultural homogeneity across the planet and getting governments/peoples to align into a "new world order." Americans hate the idea, because we feel stripped of our sovereignty, our national identity, but at the same time, doesn't it make sense to work toward that?
Scientific and technological progress within the last century now allows for a relatively small group of dedicated individuals to unleash massive devastation that would have global repercussions. It would be incredibly irresponsible to be aware of the danger, have the power to do something, and not do it. It is in our collective interest to not have rogue states (e.g., North Korea) or other groups out there building nuclear weapons. The danger is too great to allow it. A "new world order," or whatever you want to call it, is an obvious solution, not just to the problem of rogue nuclear states, but to any of the other potential civilization-enders.