I don't believe it, I know it. I personally know the supplier for several Ralph Lauren wallpapers. Ralph Lauren purple label suiting is supplied by Caruso. Ralph Lauren shoes are supplied by Allen Edmonds. Ralph Lauren furniture is supplied by Henredon. And these aren't exclusive as they often have several companies who OEM for them.

I'd recommend you climb down from the cynical mountain. There are examples and shortcuts to meet what you say. Ralph Lauren suits at Macy's are bottom tier for example. But every brand has levels and to say that every designer item is terrible is false.