I'll refer to one study that I think answers that question. A study is going to be released next month out of the United States, by two university researchers, that looked into the benefits of a qualifications-based approach. One of the results of that study will show, once it's released, that in fact with respect to this dance for the extras, as you call it, using a qualification-based system dramatically reduces that dance.
The number of change orders, the number of extras, and the number of modifications to a tender are dramatically reduced when you can procure a professional consultant based essentially on the qualifications, the background, and the level of knowledge of the professional.
So to answer your question, I would agree with you that there is a certain dance that goes on. There are a number of change orders, there are a number of amendments that always happen and that add to a project cost. But I think if you can procure a professional consultant, who really is a bit of a steward of any infrastructure project, and if you can do it in the right way, I think you can dramatically reduce those costs.