In an attempt to save money, the cheap contractor does the following and ends up spending the most money and earning a tiny profit because they believe in Maximizing over Optimizing. In the short run Maximizing can payoff; however, in the long run it never does. 

This article is a bit strong and it could offend some folks. If it offends you, please accept my sincere apologies. I tend to tell it straight and not sugar coat anything because I have been involved in the construction industry most of life beginning with working in my Step Father's construction company after school in the mid 1960's.