Binarydrone - I wasn’t so clear on your point in the OP, but as you developed it, I realized more where you were coming from.
Here’s a half-formed, totally unresearched thought to be pulled to shreds: The timing you’re giving for the decline of customer service (somewhere around the seventies) seems to me to coincide with the boom in chain stores and chain restaurants (Wal-Mart, K-Mart, etc.), and the beginnings of their… I don’t want to use the word monopoly, but I can’t think of a better one. But it does seem that, nowadays, the majority of shoppers frequent the large conglomerates, rather than small, privately-owned business.
Now, in a privately owned store or restaurant, in many cases the owner’s livelihood is totally dependent on the customer service, even to the point where many of them work in their own stores. So it is of crucial importance that they have good customer service and good employees, and that they retain those employees. If customer service goes down the toilet and people stop coming, then you’ve lost your income entirely, and you’re scrambling to sell the store and find a new job.
When you get into the chain operations, however, it’s a different story. I mean, let’s face it, when it’s a billion burgers served, folks, the customers are less important than they used to be. You’re not going to eat there anymore? Fine. Someone else will and the odds are, you’re just transferring your business to the McDonald’s across town. Furthermore, should a store or two have to close for whatever reason, it doesn’t affect the owners very much. They’ve got fifty outlets left. They’ll adjust. It just isn’t as important to have good customer service when you are one of a very few games in town.
I’m not blaming them for everything, certainly. But it’s something to consider, anyway.