I am paid to perform a job or function. I am paid to acheive accurate, timely results. I am compensated based on my ability to overcome problems and correct same.
I am not paid to wait for a customer to call. If I am not in the performance of my duties I do not get paid.
I am self employed. It is a corporation that employs me. I (the corporation has) have three employees. We travel the western US working on-site at customer's locations.
I see this as Performance/Reults driven compensation.
I think teachers should be paid/compensated similarly.