I used "idea guys" in quotes because I'm referencing a specific type of person who you may not be familiar with, but I'm sure many other people here are, especially in the freelancing world. If you read the post, you can spot the cliche.
Having an idea, no matter how good it is (and believe me when I say I'm not one of those "ideas are worthless" guys) only gets you so far. At some point you need talented, skilled people to help execute on it. And it's far easier for the execution guys to crib an idea than it is for the idea guy to copy the execution skills.
Basically, the "idea guys" like to place themselves at the top of the pyramid, and think everyone else owes them something.