To win those contracts, Jarvis had to bid low, expand fast and hire sub-contractors extensively.
The annual turnover of employees has reached 100% at some of Rio Tinto's sub-contractors.
An average of around 1, 000 staff work on the site as sub-contractors but that figure can vary considerably.
Supply chains have evolved into a network of hundreds of suppliers, sub-contractors and distribution centers, adding tremendous complexity.
The Boeing B-29 bomber, for instance, had 40, 540 different parts, and 1, 400 sub- contractors provided most of them.
Construction of the Inspire Luton Sports Village in Stopsley was delayed by five weeks after three sub-contractors went into administration.
They were also forced to confront a situation in which many crucial sub-contractors were located in foreign, and often unfriendly, countries.
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You can't have a car-manufacturing sector without sub-contractors, for example, and once the big plants close the volumes don't make economic sense any more.
In another scheme to resurface the main route for vehicles in the square, sub-contractors are having to relay the road surface after problems were identified.
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Adversarial relationships between customers, main contractors and sub-contractors mean that design changes often cause rows and that problems are not tackled until they reach crisis proportions.
However, even if the airports themselves are trying to reduce their emissions, it is difficult to control all the concessions and sub-contractors that work within big airports.
In recent months, US forces in Afghanistan have pledged to increase their oversight of security contractors and set up task forces to track the money spent among sub-contractors.
The analogy I raised to pension intermediaries secretly profiting from money managers was that of a contractor hired by a city to build a road who solicits kick-backs from sub-contractors.
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Some of those listening to him were sub-contractors to the Patton Group and they raised their concerns about the knock-on effect that the building firm's apparent collapse would have on their businesses.
Over one-third of Americans are now registered as self-employed, becoming small businesses in a P2P economy of professional services and retail, or sub-contractors in growing sectors such as healthcare and data collection and analysis.
Total said it was "encouraged" by the amount of feedback from workers involved, but would not know how many had reapplied for their jobs until the end of the week because of the number of sub-contractors on the site.
In other words, and as Mr Wen implied, MG's importance is as a symbol of the kind of investment China wishes to make in the UK, to transform Chinese companies into owners of valuable brands rather than just sub-contractors for western businesses.
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