If you ask for a small commitment that's what you'll get. If you ask for a BIG commitment then you will get a BIG commitment. The leader should never cower or be afraid to remind his people what the organization or group values are and then hold them accountable to those values.
That's a BIG part of application. Leaders are always at their BEST when they are CALLING their followers to their best, not letting anyone get away with sloppy standards. You get what you emphasize! Leroy Eims said, "if you play a man's game, men will come to play."