My company has changed has changed our 401k provider twice in the last five years to reduce this phenomena for our employees. Of course, eeyore complained that it was done to enrich the 1% at the expense of the 99% even though the company offers the same plan and same match to all employees.....
https://www.mainstreet.com/article/warning-you-may-be-handing-over-155000-in-401k-fees?_ga=1.42564454.255917359.1414668116
https://www.mainstreet.com/article/warning-you-may-be-handing-over-155000-in-401k-fees?_ga=1.42564454.255917359.1414668116