Reading a letter from Redemeer church, I noticed the mention of her vision: "Not to build a great church, but to build a great city". If I coincide this with their very active "volunteering" promotion which has flourished in almost all areas of servitude, it gets me worry.
In a way, our oriental church structure is very different because there are a lot of volunteers so to speak; while the western culture has made almost all aspect of church serving a full time job, from music to administration, which has gradually seen its degradation.
At times I wonder if this was Tim Keller's way of standing out differently. But promoting volunteering works, even with supervision, there is a danger of convictions in fellow-workers.
To gain more understanding of the problem of this type of "Social theology", perhaps I should read up on A Theology For The Social Gospel by Walter Rauschenbusch. Study it from the view point of the opponent.