The basis of my concerns with the SFI system starts with the fact that its membership includes both the sanctioning bodies that require that standards be met, and the manufacturers that sell the stuff that meets them...
Kirk

I don't think that is such an unusual relationship. Most standards setting bodies operate in similar fashion. maybe not through memberships directly, but certainly through collaboration between industry, users and regulators. And all of the ones I am familiar with in aerospace rely on suppliers for the bulk of their financial support. The subject matter experts are found in industry, not in the standards organizations.