I would obviously pay them if/once the idea took off, but I don't have the capital to do so now.
I'm not going to slam your idea because I don't know what it is. I can tell you that a lot of entrepreneurs have to do a LOT of work on great ideas to make them viable. Even if it's a great idea, it really has little to do with the idea and everything to do with execution. I like this model from Derek Sivers: http://sivers.org/multiply This would say that your idea is currently worth $20.
It's also very common for people to want to protect their ideas. I like this quote from Howard Aiken:
"Don’t worry about people stealing yours ideas. If your ideas are any good, you’ll have to ram them down people’s throats."
I'd suggest getting into a good startup mentoring program. I work with Founder Institute and like that. There are many out there. Bring your idea to the table. Let everyone shoot holes in it. Use their network to find tech talent and maybe money.
Even with a great idea, the exciting part is making things happen, learning things, beating the odds. Definitely go for it... but don't think you've yet begun the journey. Good luck!
I'm happy to chat with you if you'd like.