Mickey Mouse interviews - but only 20% turn up

I recently read an interesting and thought provoking interview in a recent addition of Recruiter magazine (www.recruiter.co.uk). Only 20% of the candidates who had been selected for job interviews in London for Disneyland Paris turned up! Now, as a recruitment consultant I realise that on occasion a candidate would let you down and not turn up for a pre-arranged client interview and that is all rather irritating and somewhat embarrasing. However, 20% is a huge percentage - especially at this time when there are so many unemployed.

I was just wondering if anyone has any thoughtful insight as to why this sort of thing happens as much as it does. Life happens of course and on occasion a candidate will call up to give apologies for not being able to make an interview due to illness, an emergency, a flooded kitchen etc, but the Disneyland Paris situation is surprising.