A true story;-
An exec pilot is escorting his client (a chairman of a large UK blue chip company) through an airport terminal towards his spotless leather lined aircraft when the client sees two helicopter pilots in coveralls and muddy boots sitting in the canteen. They were somewhat dusty as they as they had just finished a long day underslinging.
The client turns to the exec pilot and says "Captain, who are those filthy pilots?
" Oh don't worry about them Sir, they're working class pilots"