Final answer:
A plumber who sets his own work schedule is an example of an independent contractor, as they have control over their work details, unlike employees, supervisors, or union workers. If someone lobbies as part of their job for their employer, they are an in-house lobbyist.
Step-by-step explanation:
The question you are asking refers to the classification of a worker based on their work arrangement and relationship with those who engage their services. Specifically, a plumber who sets his own work schedule would be an example of an independent contractor. This is because independent contractors typically have control over the details of how they perform the services for which they are hired. They often have multiple clients, provide their own tools, and manage their own schedules, unlike employees who generally work under the control and direction of their employer. In contrast, a supervisor is someone who oversees the work of others, a union worker is an employee who is part of a labor union, and an employee has a more permanent and structured relationship with their employer where they might not have as much freedom in setting their schedule.
In the additional information presented, someone who lobbies on behalf of their employer as part of their job would be an in-house lobbyist. An in-house lobbyist is a paid employee who lobbies on behalf of the organization that employs them. A volunteer lobbyist, on the other hand, would not be paid for their lobbying efforts.