"Amateurs study tactics, veterans study strategy, but masters study logistics."That's probably why I'm almost always a Worker when I play Fat Princess.
But onto how this relates to conspiracy theories, and something I hope Debra will think about:
Usually, when I hear a conspiracy theory, I try to ask what I consider to be important questions that can be summarized as this: How did they get the resources, and how did they get them to where they needed to be?
If the conspiracy posits some unknown technology, they tend to run into trouble on how science works: The days when a lone scientist could make large breakthroughs is pretty much gone. There's little reason to believe that the government could hire only a handful of scientists and make something the rest of the world working together couldn't. The reason for this is we've gotten some very good broad strokes of how the universe works. The new technology-enabling discoveries we have to work on involve very large undertakings: Huge machines to smash particles together, large clinical trials on drugs to see if they actually have an effect, and so on. Science is a team sport, and whenever you increase the number of people involved, the harder it is to keep it secret.
In other cases, many conspiracy theories posit a government that is perfectly efficient, which is no better than invoking magic as an explanation. There's no reason to believe that the people working for the government or the conspiratorial faction are superhuman: They can make mistakes. They can have their own agendas. Ideally, governments are designed to prevent anyone from having undue influence because of various checks and balances. In reality, this often makes everything the government can do inefficient or incompetent.
The difficulty of any conspiracy increases with the level of secrecy involved: There's always someone who can grow suspicious if resources go missing. Many bureaucrats exist to keep an eye on money supplies and others to keep an eye on the ones keeping an eye on the money. For military supplies, especially nowadays with added fear of terrorism, you'd think someone would notice if a shipment of explosives went missing.
And finally, any large endeavor requires manpower. Every new person added to the conspiracy is a potential security risk. The more people you add, the more likely someone might grow a conscience or a brain and blow the whole thing wide open. Not only that, each new person, even if you could somehow guarantee their loyalty, adds to the number of people who could make a mistake or let something slip out.