The missional aspect is twofold. First, we are sending out youth equipped to be disciples of Jesus. Second, by having effective ministries for youth, we MAY be attracting younger adults who MAY also bring their children.
People maintain the level of involvement they had at the time they joined the church.
So if someone joined without participating in any ministries of the church, or while not tithing, or while only attending once a month, they ll probably continue that pattern after they join, and it will be harder to get them to ADD responsibilities at that point than before. The balance of flexibility and stability works when the two function as a kind of fluid around a center that center is a clearly defined and owned purpose. The Purpose Centered Church Decisions in any organization will be driven by purpose or by preference. In the church there can be lots of energy, lots of activity, but little power or effectiveness because the energy is dissipated by not being focused in a particular direction. So busyness overtakes business.