Here's my simplistic answer to this in three words: incompetence, corruption, self-interest. Having worked on a multiple construction projects and witnessed all

Here's my simplistic answer to this in three words: incompetence, corruption, self-interest. Having worked on a multiple construction projects and witnessed all 3 abovementioned aspects in various shapes and forms,I'd like to give a real life example. In the second largest city in Lithuania,a retailer got an approval to build a massive shopping center in the very center of the city.An agreement between the city council and the retailer was made and part of the project was to build a small bridge connecting the road outside the shopping center and a small island in the river alongside the road. The contract was won by a company that specialises in road and bridge building..So far so good. The works started. I used to go past the site on daily basis and often observed many people simply standing on the upcoming bridge and not doing much... Eventually a guy I used to know got a job with the company to work on that bridge project.Money was good..He quit after only a month.When I enquired what happened,he said that he is a man of work and can't stand idle. Even thought he tried his best,he couldn't stand the fact that he simply couldn't not work.On his first day,he went to the site manager and asked what he should be doing.He got told to collect a massive spanner and tighten 12 bolts on the metal construction.He returned to the manager in 45min or so and asked what's his next task.The site manager looked at him with anger and disappointment and said: look, it's your first day and you already making mistakes.I have given you a task for the whole day,not just for 45min..So now I now have to come up with something else for you to do.. Don't you ever do this to me again.You need to preserve your work,not rush with it.. Now scale it up to a massive underground project and you'll get the idea where the money is going to..