The word "corporatism" in this context is not a very good translation. It's a real quote, but "corporation" in Mussolini's time would be more accurately translated as "guild" or any arbitrary hierarchical group of people with common interests. Corporations as we know them (commercial enterprises) weren't a thing as far as Mussolini knew.
As much as I appreciate the sentiment this quote carries, it's just not applicable to anything today. Snopes thread about this:
message.snopes.com/showthread.php?t=36218