In total dollars, the increase went from $72 million in 2011 to $722 million in 2015, according to Fair Health.

Employees say they want more guidance on their overall performance, but the problem is that most managers don't readily supply it.

Teams including both genders consistently outperform male-only investment managers, according to a 2015 Morningstar study.

Proposed legislation would cap contributions to mega IRAs and help employers contribute to younger workers' 401(k)s while they pay off student debt.