You can't plan any better than your models, and if your models are insufficient then your decision making will be inherently flawed. Penny pinching is good until it's not, and the data to see when the transition occurred isn't on the balance sheet until maybe it's too late. At the point you're pinching the penny of the doorman, you don't have the data about the impending customer decline.
I suppose it's like enshittification. It's presented as a progression to a new worse thing when it's more of a Dark Age of 'soft' knowledge.
Yes a doorman is a cost, and a greater cost than previously, but we've also got more money to waste on such fripperies.
I think some small pizza shops have had proper simple web pages, probably because it's do-or-die for them and the person contracting the web page is the person also knowing very well how the business is doing. Also phone interactions are very fast and straightforward. It's sad to see them having to struggle with terrible card payment terminals and everybody trying to take a cut (credit card and delivery companies).
I'd love for this to be true, but every business nowadays sees employees (except maybe whatever group is core to their business) as a giant cost centre. Every employee cut is money saved. Hence customer service consistently being shit, since it's an easy place to skimp on. Now, the doorman's fallacy could be applicable here; good customer service will create repeat buyers and good word of mouth, but I doubt you need to put that many people into it to make it good. Thousands has to be well past diminishing returns. Even if only 20% of people find the happy path in some stupid web app, that's potentially thousands of man-hours that customer service didn't have to provide, and thus a lot less employees you don't really need.
The root cause of that is minimum wage - if you raise it then automation becomes important, and where you can't automate it drives up prices of essential goods. So a doorman is either automated away or needs a raise to afford to live.
I'm not sure what you mean. Prices rising is what we call 'inflation' - one doesn't cause the other. They're the same thing.