The notion that everyone will work for the common good has be debunked by the Soviet experiment...
Which while it failed...at least took Russians from their 16th Century rural life into an urban, industrial setting in a few generations...
We know that people are greedy, mean and prone to corruption...
The NEW SOCIALISM....tries to harness that greed for the common good...the best example is a COMMUNIST ECONOMY... China...which now dominates the global economy.
A blended economy is the most productive... Something that allows the market to work...and greed to happen...but not the point where a few people exploit everyone and eventually destroy the goose that laid the golden egg...AS HAPPEN IN AMERICA!
Future Historians will use both Soviet Russia and Free Market America as cautionary tales...on how badly things can go wrong.