Don't get me wrong, in the timespan of an individual's life it may well make sense to heavily buy into this system. I'm just making the point that it's current form is rather new and appears loosely connected to the real world and is subject to change.
To me, the current stock market seems like a fiat currency without the threat of physical force. Maybe the temptation will be to increasingly merge government with large companies in order to keep the plates spinning.