Your supplier's supplier is most of the time confidential information and part of your secret sauce. When one manages to take an omniscient seat, it's easy to s

Your supplier's supplier is most of the time confidential information and part of your secret sauce. When one manages to take an omniscient seat, it's easy to see the flaws in the system. In practice this rarely is true. Unless you have vast amount of clients and money there are almost no incentives for you to build from ground up your own supply chain. Mid size businesses, when very successful, manage to break away from a 3rd party factory and build their own. That's a massive win. Most of the raw materials will come from downstream providers and the task to get either redundancy or break away from them is going to cost you a lot of money and business margins.