How do the big companies source out their products?

I have been on SaleHoo, eBay, Amazon.com and all the other places I could to sell. I use to sell closeouts from target, meijers and other Big Box Stores.. it was a No Go! I have made mistakes in this industry like all new comers until I met the retail giant CEO and I will tell you the truth behind the scenes is everyone is controlled in a way to not make a lot of money. If there is a way that hurts the higher ups it will be stopped so the secret I was told was to take a product from China like they all do and put your name on it or invent it and sell it local and get enough buzz to sell international...there are a lot of people starting this...its setting us up back to where we were in an era where the USA was manufacturing and distributing products and services that was a good time to have a factory. Find a company like you and team up and be reasonable. Greed is sad these days because you need to live off of something but to knock someone down for it is pointless.