I don't know where you were during the '70s, but I wouldn't term those times "prosperous" for my family by any stretch. But, you're due your view about my generation. I'm sure not all Boomers are idealistic job-squatting middle managers who can't stop getting teary-eyed everytime they hear Joan Baez or see "The Big Chill."
Anecdotes don't change the fact that as a nation we haven't seen anything like the Great Depression since the '30s, and that in general, the character of those who grew up during that period were shaped by it.
Those who grew up during the Depression didn't want their kids -- the Baby Boomers -- to experience anything of the hardships they remembered all too clearly. Instead, as most parents do, they wanted their kids to share in their prosperity, the likes of which they could only dream about during their own childhood.
The Boomers, being that much further removed from the Depression, knowing little if anything about real hardship, raise(d) their kids accordingly.
Of course, these are generalities. Even in times of great prosperity, there are people who don't prosper. Individual hardship doesn't have the same affect on a generation or a nation as that of national hardship.