&gt; Assuming you are paying them a living wage, what economic output could [200-300 million people] accomplish that would be &quot;worth&quot; say 5 to 15 trillion dollars a year?<p>A good thought experiment! My initial thought was a spiritual successor to WPA-like projects of the depression, but I&#x27;m not very well-read on the economic outcomes. My layman view at least sees the humanitarian and creative output of such projects.<p>But your last sentence is key: would it be &quot;worth&quot; 5-15 trillion&#x2F;year? Is there a way to &quot;measure&quot; such a number of WPA-like projects?