I'm not sure people are even stressed about vacations. I think people are so stressed that if they lose their jobs, they lose their healthcare and since so many people have so little savings they face homelessness (our school system doesn't do a very good job of teaching economics for the individual - my parents taught me), They're stressed because their hormones are out of whack because for so many our diet and exercise routines are horrible (though, some of that could be blamed on long commutes). It's a symphony of issues that's causing stress derived from work that isn't the work itself, or time away from it =(