Reddit mentions of The Social Credit Phenomenon in Alberta (State and Economic Life)

A good question. Not directly related to my research but I can say a bit.

In some ways the roots are similar. As you note, both the CCF and Social Credit were a response in part to the failures of capitalism (especially during the Great Depression, but during the broader post Great War period, where the promises made to regular people about the world after victory were not kept)

Indeed, before the Social Credit party, there was the social credit theories of CH Douglas, which you can find promotions of within many labour union newspapers in the 1920s. Some people in the labour-left circles though it was quackery, but not all. In the 1920s, for instance, William Irvine and J.S. Woodsworth studies social credit as a theory, but it never really latched on.

I would say that Social Credit had less of a natural 'labour' base than the CCF, but it had a sort of progressive origin despite the party being seen in its later years as a sort of far-right body in the Reform Party vein. It did indeed have some working class support, and it should be known that it was influenced by earlier progressive governments in Alberta (the United Farmers of Alberta, which would eventually hook up with the CCF)

One good book to read here is by Alvin Finkel (https://www.amazon.ca/Social-Credit-Phenomenon-Alvin-Finkel/dp/0802058213), who basically notes that when the SC won in 1935, seeing it was a right-wing party is a pretty simplistic view. Rather, the party over the next decade transformed into a right-of-centre party, but it's origins are in a critique of capitalism, though not in the sort of same systemic manner you saw from the CCF. Still, the first SC government in Alberta governed on economic issues as a more-or-less left of centre party.