... Given that the US stock indices great at what? 11% per year on average since the great depression? Lots of 40s/50s era folks still alive and kicking who learned early the basis of frugality, let it stick, saved, invested, and grew their funds...
Unfortunately, recently we've been "taught" differently. Excessive corporate greed and cronyism has given us two bailouts - basically resulting in having our hard-earned money snatched from the hardest working folks, and... well, you know the story. Plus, my investments have gone absolutely nowhere in the past 10 years.
You can't argue with recent history and results (or lack of). The message to kids today is not investment and frugality, but to spend like there's no tomorrow. Saving is not rewarded like it once was.