G.D.H. Cole 
Payment of Wages [PDF ebook] 
A Study in Payment by Results Under the Wage System

First published in 1928, The Payment of Wages came out amid the controversies over workshop conditions caused by the Great War. It has held its place as the standard work describing the various systems of wage payments and their effects. Mr. Cole raises challengingly the question of the need for a completely new policy on the part of the trade unions and employees alike. This book is sure to provoke discussion, and would be of interest to students of economy and history.