"At some point in the life of most local churches a critical point is reached when the core fellowship of those committed to gospel vision are outnumbered by a fringe who are there for quite different reasons, be it spiritual comfort, kids activities, personal support, or whatever. Regardless of the particular type of church government, all fellowships struggle to maintain focus around core vision when the fringe, be they believers or not, outnumber the gospel-oriented core. It is very hard to maintain focus, or alter any aspect of church life to reflect the gospel needs of a fresh generation, when the majority are committed to maintaining their comfort. When this happens "Christians" have been replaced with "churchgoers" who assume they are Christians."
That seems to be the nature of the beast when it comes to the church. The Exodus people of Israel quickly forgot their redemption and pined for their leeks and onions and devolved into complaints and idolatry. So much so that God had to let a generation die out before they could enter the promised land. And, if you read through the history of Israel it's easy to see how quickly the pattern that Honeysett describes here happens. The people of God forget or jettison their identity as redeemed people, and they jettison a redemption-driven agenda for other agendas. The church in Corinth is a good New Testament example of this.
It's probably just something we have to accept and accept that getting the gospel into the church is an even greater priority than getting it into the world. I remember vaguely hearing Tim Keller talk about Redeemer in Manhattan. Redeemer is well known around the world as a leading light in gospel based, missionally driven ministry, yet if I remember correctly Keller said there were probably only a third or a little more at his church who were really getting the whole gospel-missional thing. Aside - if you are a member of Redeemer or are familiar with their ministry and can correct me on this please do so.
So the point is that our first and greatest battle is to gospelize the church.