Answer:
Some of these ethical issues are
1. Wages or incentives
2. Discrimination among employees
3. Issues on health and safety of employees
4. And other internal issues that may come up in the company or organization.
Explanation:
While dealing with contractors, a public manager is likely to have the issues above with contractors so he has to learn to tolerate and must also not show any form of discrimination against any employee or show any preferential treatment to any selected worker. He has to employ tact's when dealing with contractors as well as when he is dealing with his employees.