I'm not sure this is really a financial problem. Real wealth doesn't exist in cash, but in assets that can be used productively and/or can grow in value. Interestingly, it's much easier to build "wealth" with cash in a deflationary environment than at any other time -- since the nominal value of the cash will grow even if you just bury it in your back yard.
How quickly we forget that inflation, not deflation, erodes the value of money over the long term.
There have been plenty of reports that the middle class is on its way to extinction in the US. The strength of the US and most any vibrant economy is a confident middle class.