If you want an insight into its work ethic, well let me assert to you that, yes, I was employed by McDonalds once, and was made redundant on my first working day. I knew that I had some shortcomings that the boss was averse to, but not giving me another chance to prove myself on the following day does make an impression that McDonalds is only focused on making profits and expects everyone to work expeditiously, which is impractical for novices like me. Many people would say that that is how the food and beverage industry runs, but do they really try out their jobs first before they form that speculation?
Companies will never be successful enough - all their achievements thus far have been mere steps forward in their progress towards a highly-stressful workforce. We will never be able to sate our society's appetite to reach higher levels of customer service.