Less inequality will create opportunities for better education for millions if not billions of humans. That will improve technology in ways that just producing more stuff will not.
I do not think that to tie increased consumption with better technology is true. Most of what we produce is low tech stuff like fast fashion. I will argue that producing less and having more time for leisure will also increase scientific output.
So, economic growth is not the same that technological advance. And that is one of the points of the "lefty Europeans": economy measurements are not tied to human advancement and well being but just money.