Firms will look at your $600k 401k AUM, Investor Policy Statements, and laugh you out the door. They won't care, you have no say. Your 401k plan is between them and your employer.
A few things:
- yes 401k fund options are negotiated by people that don't know I exist, or care
- but... how I allocate my contributions to those funds is under my discretion
- and... I've never stayed somewhere long enough to have a $600k 401k balance. As soon as I'm gone, I roll it over to a private account that I have full control over (and much lower expense ratios.)
So I don't really care if I'm in the door or laughed out the door, because it has no material affect on how I manage my finances.