Could it be the markets are so propped up because we live in a world totally awash with capital. Look how many billionaires and multi millionaires there are now globally compared to 10 years ago. Look how much $ has been put into 401ks and pension funds in the last 10 years.
While the stock market and economy in general have been sluggish the last 8-9 years, there has been an explosion in personal wealth. With all of this $ needing a place to park it seems like the market will be able to be propped possibly....
From what Ive read those millionaires and billionaires you are referring to have already pulled out of the market within the last year. Watch the volume being traded. It is usually way down anymore. The market is way over valued right now and will come back to Earth eventually.