http://harvardmagazine.com/2010/07/after-our-bubble?page=0,3
It isn't a matter of the "The only real portion of the society that is getting left behind are the high school dropouts." 99% of the population is getting left behind. I don't know you, but I can bet pretty reliably that you are also being left behind. Very few are a part of the economic growth the nation has had.
It is a good idea to have a strong middle class. Concentration of wealth isn't a good thing.
That is because the economic growth was and is "fake". It was all a bullshit house of cards built purposely by the Republicans and the Democrats. The rich generally do better in these times because they don't have to go "all in" to make money off of the scam (be it the dot com, the housing bubble, etc...) and can often ride out the recession and even make a lot of money from it while the middle class gets flat busted. The uberwealthy own the government (both parties) so they always do well, hell they write the laws half the time.
An anecdotal story: I know 3 guys that were flipping beachfront condos during the bubble. One of them was rich, 2 of them where pretty well off but by no means rich and none of them knew when to get out. I knew something was bound to go tits up fast when they were bragging about making $10's of thousands flipping pre-constructs that they bought and sold on the same day. Today, the rich guy is stuck with 4 condos he can't sell, one of them is his personal place that I guess you can consider not a "hit" (although I am sure he wished he bought it a year later but I doubt he would sell it for what he owes today), the other 3 are worth less than half of what he paid. He just keeps making the notes and rents them out to recoup 20ish% of his yearly costs.
The other 2 guys are bankrupt. They went "all in" and extended their credit well beyond what they could ever dream of affording if they couldn't flip the properties in a relatively short time. They lost all the money they made (100's of thousands, huge sums of money for these guys), the banks finally took the condo's (after a year of non-payment), lost their "weekend" cars, etc... Their lifestyle is roughly what it was before any of it started but they are definitely worse off. Entire savings wiped out, bankruptcy on their record, limited access to credit (maybe not such a bad thing), etc...
My point is that you can make a ton of money in a recession, the rich guy continued to make money buying stocks that had been hammered to hell. He has made a ton of clean doubles in the stock market and purchased a bunch of assets for his company at pennies on the dollar.
The other 2 guys don't have a dime to invest. They are getting by but they damn sure aren't making much "progress". One of the dumbasses even liquidated as much of his 401K as he could to try and "hold on".
Add to that the current Fed policy and even the savers aren't making any headway. You must invest in something in order to move ahead right now and not everyone is able to invest in themselves (start their own company, get a better education in hopes of earning more, etc..) even if they can afford to do so.