I don't think it is just the disposable income. As competition has become more global there is far more stress to be at the top or stay at the top which tends t

I don't think it is just the disposable income. As competition has become more global there is far more stress to be at the top or stay at the top which tends toward trying to optimize all sorts of choices. In my high school years, if you were smart enough you aced everything and that was all. Our valedictorian had a rowdy social life and there were few ideas that you had to show any real skills to the level expected in a local member of industry then, let alone today.