My overlap between the two has always been "the reason authoritarianism isn't working is because its not authoritarian enough".

This is also something capitalism does with 'privatized/corporate authoritarianism'. "The reason the economy isn't working is because the plutocrats are not given enough free reign over society"

Like at the end of the day there's two groups of thought: "the public is good at decision making" or "the public is bad at decision making" and pretty much everything falls out of that core asumption.