"Pressing this button should dispense candy but sometimes causes a deadly electric shock. The fix is expensive and I don't want to have this on my expenses sheet so I'll just say it's OK and someone else will take the cost." This "someone else" says "Nah, we'll fix it in production." QA was outsourced to a country where candy is outlawed so they don't test the candy dispensing functionality. Product goes out, some children get electrocuted and marketing does damage control by saying "we took our valued customers' suggestions to heart, decided to lower the shock value by 15% and give parents of children killed by our product a time limited 25 cent store credit because we love you so much." That's corporate product development for ya.
The thing with being a multi-billion dollar company is that you are essentially deaf to the outside world. Even in a small-ish company you face problems with people sending garbage data and feedback up the chain to make themselves look better or hide incompetence and laziness, or both. Multiply this by several thousand and you get a corporation where people lie all the time because they just don't care about anything other than what benefits them personally. Garbage in - garbage out, so if most of your internal feedback is trash coming from "yes men" and problems get trifled or ignored at several levels, guess what will be the output? You can create parallel feedback sources and incentivize doing actual work, but this costs money and effort so goes against everything a corporation stands for.
