People are much more polite and patient when they don't feel like they are having to fight for resources.
I think this does affect people, but my gut feeling is that it isn't the reason for this problem.
I think staffing levels are part of it. You need a certain number of people to operate properly.
But I can't help thinking it reminds me of what is also going on in schools and universities and even sometimes in some workplaces. I feel like an old fogey saying it, but it's like people don't know how to behave. They don't have a sense of rules of behaviour, how to work in a group in a way that makes it easier for others.
I work in an elementary school, and my boss is about the same age as my mother, who was a nurse. I find it really interesting that they both describe very similar changes in their experience over the years in these two sectors. My boss is continually saying that the kids we see don't know what is expected or how to regulate behaviour compared to the past, and more to the point, that the teachers don't know how to manage the class, or seem to expect the class to be manageable - even though there are fewer kids and they have assistants.
Now, you might say that is because there is more classroom integration, but my mother finds the same thing in hospitals. Again, it sounds like bah humbug, but when she was a young nurse they has serious expectations about how the wards were kept (line up the wheels on the beds), about how nurses dressed (starched caps and the whole bit)and there were also expectations about how people behaved on wards, particularly guests, and the authority the nurses had was significant - some would say they were power hungry and it was way over the top. Of course there were patients who were out of it, bad etc, but proportionally that seemed more contained.
I've noticed the same thing when I'm at the university. Expectations for behaviour are low, and ability to self-regulate among students seems low as well. Boundaries around personal behaviour are also eroded, and students can't cope with problems.
I just feel like these things are related somehow.