in reply to UK tax system uses Perl

That might be just a joke, a senior consultant created a "funny" 401 page for their PHP app and forgot about it.

Or it might be security through obscurity - in fact, they're using Python, but they pretend to use Perl to scare the hackers.

map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

In Section Meditations