GE Human Resources Internship interview questions

What would you do if you had an attendance problem because a bunch of employees made sure that they used all of their two weeks of sick leave every year, and their family maternity leave, and it cost the company $1,000 per employee per every two weeks for those who used the benefit? So, you're paying-out this money, but getting no production back for the company. How do you get people to show up for work instead of using their sick leave?