The complaint alleges that Amazon denied workers accommodations such as chairs, bathroom and water breaks, and time off for prenatal appointments. It also alleges that the company required medical documentation "beyond self-attestation" when seeking accommodations and fired some workers after they exceeded limits on unpaid time off.

More than 9 in 10 sponsors surveyed work with an advisor as they navigate plan design and investment decisions, market complexity and long-term retirement plan strategy.

A market veteran wants Congress to make the plans a lot easier to use.

"When there's a crisis, it can bring out the best in people, and I think in the workplace, that's what I saw 20 years ago," said George LaRocque, founder of WorkTech.