>more left-leaning than you'd think.
While that's true, especially of earlier works (which 1906 would definitely qualify as!) most of the fascist economics I am familiar with / have seriously studied are things like the mass privatisations of Nazi Germany or its economic policies related to the Holocaust (the expropriation and auctions, and I guess one could say "public-private partnerships" around labour camps). But you are right, there are more than a few references to the economically marginalised in fascist writings.
>left/right dichotomy
I used to feel this way, thinking the division was roughly accurate but part of a generally stifling political atmosphere. People getting given so few options so that they think fewer things, etc. But a friend of mine once argued to me an explanation for left vs right that I found very convincing. What they said was that left wing thinking is basically structural whereas right wing is basically individual. Where rightists see individuals, leftists see structures, and where leftists blame structures, rightists blame individuals. In this way, "no such thing as a free lunch" is a basically right-wing argument, as it takes a truism about how specific people interact and extends it to the government. The leftist, then, would respond that the public does something fundamentally different than the private.