These are some tips not many people are aware of and thusly don't do.
If you care about your game, be detailed and write up a clear plan to get people interested and confident. You don't have to divulge it all in one post, but a good team leader has a long list of how their game plays out. This is typically a "Game Design Document" though I wouldn't expect anyone here who is a hobbyist to be so invested they'd write one of these. They're not small task. Basically they're the detailed blueprints for a game.
Show samples of what you can do, so people know you won't just be using them because you can't do anything yourself and you don't have the drive to learn. That's always the impression I get when I see threads where someone asks for every job in the book, and can't do any job themselves.
Don't just be an idea-man. Even a Game Designer isn't just an idea man. They write both technically and narrative, sometimes script, draw up diagrams, organize the game, coordinate between teams, and test out ideas in controlled environments and play with variables. They tweak math formulas and play with numbers.
The other way is to recruit aggressively instead of passively. Browse the board, post things, get people noticing your ideas and capabilities, then go around and PM people who seem right for your project and ask them if they'd like to join. If nothing else they'll be flattered you asked.
Post in many different places, and keep up on those different posts. Sometimes linking your recruitment threads together goes a long way to making people aware of your project's scope and reach.
Offering money only helps slightly. Not as much as you would think. Asking for money is mainly to get people who do work on a commissioned level, or for finding original resources to sell your game off of. However selling a game takes extra work, and has legal stipulations with it.
Search outside of RPG Maker places if you can. Deviantart is great for artists and spriters. Coding forums are great for scripters, and writing websites are great for writers. Sometimes you can even find people at your local college. A lot of people are going into college with an interest in video games.
The more you look for a team, and the more work you invest in finding one, the more likely you are to get one. You will rarely find a team just by sitting around waiting for a reply to your post.