The reality is that the advice clients would be getting under a fiduciary rule would be cheaper, free of conflicts and tailored for their benefit, not that of the salesperson.
As a plan fiduciary you are required to act in the best interest of the plan's participants. Failure to maintain a sufficient bond can be considered a breach of fiduciary duty.
It will be interesting to see how a Trump administration handles the DOL Rule, which is scheduled to go into full effect in the second quarter of 2017.