Establishing a Retirement Plan, in itself, is not a fiduciary action but a business decision. However, by implementing a plan one is acting on behalf of the plan and in these actions one may be a fiduciary. For example, hiring a service provider in and of itself is a fiduciary function.
Acting prudently with regards to oversight is a critical responsibility under ERISA but not engrained in the culture of Employer Sponsored Retirement Plans and the Investment/Brokerage business. The culture has been compensation and product spread driven for decades. In fact, it doesn’t seem as if fiduciaries are aware of others who serve as fiduciaries which can leave them vulnerable to participate in another fiduciary’s breach of responsibility.
Oversight can be demonstrated by following and documenting a formal review process visible through technology. This is what the regulatory authorities are asking for.