Economic justice was not a mainstream concept before the Great Depression. The predominant economic theory advocated a laissez-faire market philosophy in which markets would fix themselves through unregulated cycles. With the development of industrialization, business cycles became more and more extreme with dire consequences for ordinary people. With the Great Depression, some began to advocate for a change in philosophy.
Match the following advocates with the policy for which they advocated.

Advocates:
John Maynard Keynes
Upton Sinclair
the U.S. Supreme Court
Huey Long

Policies:
"Share the Wealth" movement
large-scale government spending
cooperative ventures

severe worldwide economic depression which started from United States. In some other countries it started arround 1929. Some advocates advocated some policy for change in philosophy after this, some of the advocates are;

1) Huey Long that as advocates for "Share the Wealth" movement" which started in the year 1934, Huey Long was governor in U.S, and he later became a Senator at Louisiana, his policy was that economy must be stimulated and stressed that there should be massive federal spending as well as wealth redistribution.

2)John Maynard Keynes : in his movement arround

year 1934 call the state for utilization of idle factories as well as land that cooperative ventures has to support the economy