I think that 'man-made institutions' is rather begging the question, Roz, given that Christians believe that the Church was founded by Jesus Christ, i.e. by God. That's not to say of course that individual Church members aren't capable of very wicked actions, as in the cases currently in the news, or indeed that particular Church organizations may not be subject to various kinds of 'systemic' malfunction, often very serious ones. I agree with you that Christians should be doing what they can to get these put right.

There are Christians of all denominations, not just Quakers and the Salvation Army, who 'quietly and passionately do a lot of good work in the community without needing to accumulate great wealth and dominate.' I've met some of them!