F. W. Taylor argued that work should be studied scientifically to find the single most efficient method, and that workers should be paid by output.
Taylor's method: break a job into its elements, time each one, find the most efficient sequence, train everyone to do it that way, and pay by results — piece rate, so more output means more money.
The underlying assumption is that people are motivated primarily by money and will work harder if paid per unit.
It is easy to dismiss as dehumanising, and much of it was. But it is the ancestor of a great deal of modern practice: standard operating procedures, process mapping, lean manufacturing and productivity measurement all descend from the idea that work can be studied and improved rather than simply worked at harder.
It is also visibly alive in warehouse picking rates, delivery drop targets and call-centre handle times — which is where the modern criticisms land.
Contrast it with Mayo or Herzberg. Examiners want to see you place it as one view of motivation among several, not the answer.