Authoritarian regimes are designed top-down that limits the complexity of society and stifles innovation. Authoritarian regimes also fear an educated population further diminishing society value. A social democracy is in the opposite side of the spectrum, it is created bottom-up where citizens needs shape the government allowing for a richer more educated population.
Complex societies can and will produce better technology and creativity than simpler ones. So, authoritarian societies need an easy way to get money or they will be outcompeted by more open ones.
tldr;
Authoritarian -> simple society. Oil -> can be gathered by simple societies.
this simple/complex thing isn't actually a spectrum in anything but an over-simplified view.
In reality, many technical and mathematical advances have come out of countries that aren't democracies.
It would be a mistake to think Russia doesn't have highly advanced technical capabilities, for example. It successfully developed nuclear weapons before many democratic societies could have.
Complex societies can and will produce better technology and creativity than simpler ones. So, authoritarian societies need an easy way to get money or they will be outcompeted by more open ones.
tldr;
Authoritarian -> simple society. Oil -> can be gathered by simple societies.
Social democracy -> complex society -> high-tech.