I'm not sure what aspect of construction you are in, but there is an amazing amount of inefficiency. For example, a friend of mine was working on the Tappan Zee bridge project several years ago. Union job, very good salary, benefits. He was working the night shift, making an added bonus night differential. However, there was a noise regulation in place where no work could be done after a certain hour, so for 6 hours a night this extremely well paid union construction crew was sitting around collecting very good money + night differential for doing absolutely nothing. Now his job is very real, and it requires skill, but for the purposes of argument, this was a "bullshit job" that went on for weeks and weeks and added literally millions of dollars to the cost of the job in which absolutely no work was done.