Parents Refusing to Discuss Finances

I suppose I should clarify. My father works for a company that assigns him clients and pays him for the services he provides to those clients. The company handles all of his work-related expenses. I thought that set-up him an independent contractor, but that may not actually be the case. My only point in mentioning that was to say that he can’t really predict his income in advance because he doesn’t know how many clients he will be assigned or how many hours they’ll want him to work for them. Sorry for the confusion and thanks for the advice!