Employees have come to think of sick time as a vested benefit, but that's not what it was meant for.

They can get unhappy at the conversion point if they feel they have lost something in the transition.

Some companies are doing it to save money. Others are doing it to be more family friendly. The two are not mutually exclusive.

Employees are anxious and terrified.

The content changes every year. But the concept is to provide employees an incentive for maintaining or adopting healthy habits,

The trend from defined-benefit to defined-contribution plans has not come because employees have wanted to take on that risk. It's because employers have wanted to get rid of that risk.