On May 6, 1935, Pres. Roosevelt signed executive order 7034 creating the largest public works program in history. The Works Progress Administration created 8.5 million jobs during the Depression of the 1930s.
The problem we face today is lack of demand for products and services because all the money has trickled up an little is left for lower and middle classes. It's like an hour glass with all of the sand stuck in one end (among the top wealth bracket).
For the betterment of society we need to turn the hourglass over so that money flows to the people so the people will provide the demand that will generate supply defining economic activity, and lets do it in ecologically sustainable way.