>>if the airport managers and the people who work in the airports want to introduce a system of I/D cards... and if you're a pilot who's got ten different I/D cards... <<
By implying that pilots hold multiple airside passes she is using the established New Labour trick of conflating two issues by suggesting is that holding one UK ID Card will make pilots lives easier. Harman is not thick. She knew that there would not be enough time in the programme to explore this point which is why she took the opportunity to make it.
By using this tactic she planted an idea that ID Cards are somehow convenient.
I am known locally as someone who campaigns against ID Cards. An aquaintance came up to me and said:
"Good thing that they have cancelled ID Cards"
He had seen the programme and believed the fiddle.