They follow the Church's teachings, conform with its standards and rules, and "do the job" as the Vatican tells them to do it.
Independent Contractor
People such as lawyers, contractors, subcontractors and auctioneers who follow an independent trade, business, or profession in which they offer their services to the public, are generally not employees. However, whether such people are employees or independent contractors depends on the facts in each case.
The general rule is that an individual is an independent contractor if you, the person for whom the services are performed, have the right to control or direct only the result of the work and not the means and methods of accomplishing the result.
Example: Vera Elm, an electrician, submitted a job estimate to a housing complex for electrical work at $16 per hour for 400 hours. She is to receive $1,280 every 2 weeks for the next 10 weeks. This is not considered payment by the hour. Even if she works more or less than 400 hours to complete the work, Vera Elm will receive $6,400. She also performs additional electrical installations under contracts with other companies that she obtained through advertisements. Vera is an independent contractor.
http://www.irs.gov/businesses/small/article/0,,id=179115,00.htmlEmployee (Common-Law Employee)
Under common-law rules, anyone who performs services for you is your employee if you can control what will be done and how it will be done. This is so even when you give the employee freedom of action. What matters is that you have the right to control the details of how the services are performed.
Example: Donna Lee is a salesperson employed on a full-time basis by Bob Blue, an auto dealer. She works 6 days a week, and is on duty in Bob's showroom on certain assigned days and times. She appraises trade-ins, but her appraisals are subject to the sales manager's approval. Lists of prospective customers belong to the dealer. She has to develop leads and report results to the sales manager. Because of her experience, she requires only minimal assistance in closing and financing sales and in other phases of her work. She is paid a commission and is eligible for prizes and bonuses offered by Bob. Bob also pays the cost of health insurance and group-term life insurance for Donna. Donna is an employee of Bob Blue.
http://www.irs.gov/businesses/small/article/0,,id=179112,00.html