I'm well familiar with the directors other work to know he has next to zero credibility on economic issues. And after reading the directors quotes on the 2016 election[1], I don't think he has any credibility period.
Putting the topic on its head, he is still widely respected in academia by amongst others, IIRC, Chomsky
If that's what you enjoy watching, that's cool man, but just keep in mind it's fiction and is of very little practical use besides entertainment value. Definitely don't try to build a political movement based on it! Unless you want it to fail. Repeatedly.