Solving the turnover problem

In a company that I've worked there was a huge turnover (around 60% per year). This is a huge problem, as you can imagine. So, in order to improve this situation this company decided to avoid having pictures in their passes (used to open the doors), so when an employee left the company they just removed the label with the name from the pass and gave it to a new employee, with his own personal $0.01 label.

Maybe this offers some insight why there was such a high turnover?