So, with the modern points of recognition and the laughs all in place, all that remains is Gogol's delicious sting in the tail, something Farr has been careful to preserve.
'The Government Inspector is a parable of human folly and the lens for that is the tiny world of a provincial town,' he says. 'But actually he is talking about all mankind.
'You think you're sophisticated and you can come and have a look at this play and it has nothing to do with you - but it's completely to do with you. My play is exactly the same. You're watching these funny little people from this little country and they are corrupt as hell and utterly ridiculous and totally vain and quite appalling - but so are you...'
The UN Inspector, now previewing, opens Thu, in rep until Oct 5, Olivier, National Theatre, South Bank SE1, 7.30pm (Thu 7pm), mats 2.15pm, £10 to £25. Tel: 020 7452 3000. Tube: Waterloo