He wrote, “I am one of those people who believe that, ideally, the best censorship, like the best government, is none at all” and “in the long run, the community is best left to censor itself; that when given the opportunity coupled with knowledge it can usually be relied on to reject the bad and accept the good.” On the other hand, Mirams was critical of Chief Censor W. A. von Keisenberg’s decision to approve the film Iceland in which Sonja Henie abandons her Icelandic sweetheart in favour of a US Marine, “at the very time that the American-serviceman-New-Zealand-girl problem was causing concern” in New Zealand.

He wrote, “I am against censorship on principle, [but] if we must have it I would suggest that the custodians of our screen morals might be better employed in discouraging this sort of thing than in worrying about whether we should, say, be allowed to hear a few naughty words in Noël Coward’s In Which We Serve.” In 1947 Mirams was appointed first assistant film information officer, Mass Communications Section, UNESCO.

Mirams was the first censor to make liberal use of the R certificate, allowing films to be restricted to specific audiences and age groups.

Recent research shows that during the 1950s Mirams provoked fears about the effects of modern American popular culture, especially comics and movies, in attempts to ban or severely restrict community access to such media.

[Gary Whitcher, "'More Than America': Some Responses to American Popular Culture in New Zealand c.1942-1956", PH.D. Thesis, University of Canterbury, 2011] In 1959, Mirams accepted a permanent appointment at UNESCO’s mass media division in Paris where he worked on the development of children’s television programmes.