There are two 1970's Brazilian films streaming on Netflix right now, Bye Bye Brazil and Black Orpheus. The former deals in economic change and technological progress in 1970s Brazil, (as told through the eyes of a dwindling traveling circus) and the latter is an absolutely stunning reinterpretation of the myth of Orpheus (set at Carnaval).
This recommendation comes with thanks to my in-house and treasured Brazilian, the Great Rubens Ghenov, for sending me off into one of the highest fits of inspiration in recent memory.
Watch 'em late at night, with no distractions, if you can.
Bye Bye Brasil