The economic differences between WW2 and Iraq are quite different due to various things from inflation etc, and so on, but the fact is, far more Americans died during WW2 than Iraq, and far more was on the line. On top of that, many of the men who were sent off to that war were drafted, that means they had two choices, go put their life on the line or run to Canada. Also, you can't shoot down hard facts, the number of soldier suicides among those coming home from the war on terror is extremely high in comparison to WW2, Korea, and Vietnam. And there's a pretty big difference between coming home and putting a bullet in ones head or having ptsd and an abusive parent, also keep in mind that back in the era of WW2, it was perfectly the norm to smack your kid across the face if they acted up or use the belt, it was even somewhat tolerated for a man to his wife if she acted up back in those days. So in some ways we've made progress, a man can no longer hit his wife or his child across the face and not risk getting severely punished for it.
And I'm not some 20 year, I've been around for awhile and I can say that Americans did start getting greedier and more selfish in the 80's, and many political analysts blame Reagan since he actually encouraged and praised greed. Again, one can't ignore facts, there was more balance economically back in the 50's through 70's. The US had a very strong middle class backbone, and many men back then didn't have to get a degree to make a good living, they were able to just get a solid blue collar job working at a factory or what have you and make enough to raise his family, and many had the unions to make sure they also had job security. These days, there's a huge underemployment issue because the rich have gotten more greedy, there's far more outsourcing, as well as the exploitation of undocumented workers. So yes, people have become far more selfish, at least the rich have.
However, I totally agree that some blame can be put on the educational system, and celebrity worship. The educational system in the US, excluding ivy league universities (we still have some of the best universities), are a mess these days, and over the years more and more kids see celebrities making a fortune and think they don't need to focus on school, they'll just be the next Kardashian. Scream 4 kind of had some fun at how reality tv is putting across the wrong message to teenagers, but well Kevin Williams has always been a witty writer that has touched on societies issues while not bumming people out. Back in the 80's some male teens who were athletic used to think they'd be the next Magic Johnson, and a few of those teens that I went to school with, they're now working at Walmart and Home Depot, kind of sad. However, athlete worship didn't seem to be as bad because it only seemed to affect the handful that were into sports, while reality tv seems to impact a larger group.